improves wiki history page, a=chris

diff --git a/controllers/group_controller.php b/controllers/group_controller.php
index 886e796f6..b1f9204ad 100644
--- a/controllers/group_controller.php
+++ b/controllers/group_controller.php
@@ -222,6 +222,7 @@ class GroupController extends Controller implements CrawlConstants
             "num" => 'int',
             "page_id" => 'int',
             "show" => 'int',
+            "diff" => 'int',
             "diff1" => 'int',
             "diff2" => 'int',
             "revert" => 'int'
@@ -316,12 +317,13 @@ class GroupController extends Controller implements CrawlConstants
                                 "<a href='$history_link'>".
                                 tl("group_controller_back") . "</a></div>".
                                 tl("group_controller_history_page",
-                                $data["PAGE_NAME"], date("r", $show)) .
+                                $data["PAGE_NAME"], date("c", $show)) .
                                 "</div>" . $parsed_page;
                             $data["DISCUSS_THREAD"] =
                                 $page_info["DISCUSS_THREAD"];
                         }
-                    } else if(isset($diff1) && isset($diff2)) {
+                    } else if(isset($diff) && $diff &&
+                        isset($diff1) && isset($diff2)) {
                         $page_info1 = $group_model->getHistoryPage(
                             $page_id, $diff1);
                         $page_info2 = $group_model->getHistoryPage(
@@ -349,8 +351,8 @@ class GroupController extends Controller implements CrawlConstants
                             "<a href='$history_link'>".
                             tl("group_controller_back") . "</a></div>".
                             tl("group_controller_diff_page",
-                            $data["PAGE_NAME"], date("r", $diff1),
-                            date("r", $diff2)) .
+                            $data["PAGE_NAME"], date("c", $diff1),
+                            date("c", $diff2)) .
                             "</div>" . "$out_diff";
                     } else if(isset($revert)) {
                         $page_info = $group_model->getHistoryPage(
@@ -361,7 +363,7 @@ class GroupController extends Controller implements CrawlConstants
                                 $page_info["PAGE"],
                                 $locale_tag,
                                 tl('group_controller_page_revert_to',
-                                date('r', $revert)));
+                                date('c', $revert)));
                             $data['SCRIPT'] .=
                                 "doMessage('<h1 class=\"red\" >".
                                 tl("group_controller_page_reverted").
@@ -380,6 +382,13 @@ class GroupController extends Controller implements CrawlConstants
                             $data["HISTORY"]) =
                             $group_model->getPageHistoryList($page_id, $limit,
                             $num);
+                        if((!isset($diff1) || !isset($diff2))) {
+                            $data['diff1'] = $data["HISTORY"][0]["PUBDATE"];
+                            $data['diff2'] = $data["HISTORY"][0]["PUBDATE"];
+                            if(count($data["HISTORY"]) > 1) {
+                                $data['diff2'] = $data["HISTORY"][1]["PUBDATE"];
+                            }
+                        }
                     }
                     $data['page_id'] = $page_id;
                 break;
@@ -392,6 +401,9 @@ class GroupController extends Controller implements CrawlConstants
                     if(!isset($filter)) {
                         $filter = "";
                     }
+                    if(isset($page_name)) {
+                        $data['PAGE_NAME'] = $page_name;
+                    }
                     $data["LIMIT"] = $limit;
                     $data["RESULTS_PER_PAGE"] = $num;
                     $data["FILTER"] = $filter;
diff --git a/css/search.css b/css/search.css
index 818842e7f..3594abe20 100755
--- a/css/search.css
+++ b/css/search.css
@@ -1876,7 +1876,7 @@ div.group-result
     font-size: 16pt;
     max-width: 9in;
     min-height: 6in;
-    min-width: 8.5in;
+    min-width: 9in;
     padding-left: 0.1in;
     padding-right: 0.1in;
     padding-bottom: 0.1in;
diff --git a/locale/ar/configure.ini b/locale/ar/configure.ini
index c14e0f888..f8e4cef4d 100755
--- a/locale/ar/configure.ini
+++ b/locale/ar/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "تمرير الاختيار."
 ; system_component.php line: 1041
 system_component_using_local_config = "استخدام configs/local_config.php حتى تغيير دليل العمل أعلاه قد لا تعمل."
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/bn/configure.ini b/locale/bn/configure.ini
index 5fa1a29aa..4ad624a65 100755
--- a/locale/bn/configure.ini
+++ b/locale/bn/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/de/configure.ini b/locale/de/configure.ini
index f51950771..acddf5c64 100755
--- a/locale/de/configure.ini
+++ b/locale/de/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/en-US/configure.ini b/locale/en-US/configure.ini
index f84415774..9f996ce9e 100755
--- a/locale/en-US/configure.ini
+++ b/locale/en-US/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "Check Passed."
 ; system_component.php line: 1041
 system_component_using_local_config = "Using configs/local_config.php so changing work directory above may not work."
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = "Missing Fields!"
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = "Page Saved!"
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = "Back"
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = "Historical Version of %s from %s."
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = "Back"
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = "%s line differences between %s and %s."
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = "Revert to %s."
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = "Page Reverted!"
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = "Error Reverting Page!"
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = "Main"
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = "Comment"
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = "Start New Thread"
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = "Edit"
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = "Delete"
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = " (%s posts)"
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = "Comment"
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = "Start New Thread"
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = "Add a Comment"
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = "Save"
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = "Start New Thread"
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = "Subject"
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = "Post"
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = "Save"
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = "Edit Post"
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = "Subject"
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = "Post"
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = "Save"
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = "Group Feeds No Longer Updating!"
 ;
 ; machinelog_element.php line: 61
@@ -3337,10 +3337,10 @@ wiki_element_savebutton = "Save"
 wiki_view_wiki_page_list = "%s Group Wiki Page List"
 ;
 ; wiki_view.php line: 290
-wiki_view_filter_or_create = "Search through group pages by title"
+wiki_view_filter_or_create = "Search group page titles"
 ;
 ; wiki_view.php line: 293
-wiki_element_search = "Go"
+wiki_element_go = "Go"
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = "Create Page: %s"
@@ -3348,28 +3348,28 @@ wiki_view_create_page = "Create Page: %s"
 ; wiki_view.php line: 334
 wiki_view_back = "Back"
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = "Cur"
+; wiki_view.php line: 349
+wiki_view_difference = "Difference:"
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = "Next"
+; wiki_view.php line: 355
+wiki_view_go = "Go"
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = "Cur"
+; wiki_view.php line: 373
+wiki_view_diff_first = "First"
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = "Next"
+; wiki_view.php line: 376
+wiki_view_diff_second = "Second"
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = "Edited by %s. "
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = "(%s bytes)."
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = "Revert"
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = "Revert"
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/es/configure.ini b/locale/es/configure.ini
index 42b77bc82..4e85c9a03 100755
--- a/locale/es/configure.ini
+++ b/locale/es/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "Entrada Aprobada"
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/fa/configure.ini b/locale/fa/configure.ini
index 0c0b71772..06835c89b 100755
--- a/locale/fa/configure.ini
+++ b/locale/fa/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "در بررسی مشکلی پیدا نشد."
 ; system_component.php line: 1041
 system_component_using_local_config = "از configs/local_config.php استفاده می&zwnj;شود، بنابراین ممکن است تغییر بالا عمل نکند."
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/fr-FR/configure.ini b/locale/fr-FR/configure.ini
index ec57caebc..619a7a888 100755
--- a/locale/fr-FR/configure.ini
+++ b/locale/fr-FR/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/he/configure.ini b/locale/he/configure.ini
index 375a1fe29..fba5c3056 100755
--- a/locale/he/configure.ini
+++ b/locale/he/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/hi/configure.ini b/locale/hi/configure.ini
index 7beb1dfb5..31ab5ce99 100755
--- a/locale/hi/configure.ini
+++ b/locale/hi/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/in-ID/configure.ini b/locale/in-ID/configure.ini
index 31622344f..f76318f1a 100755
--- a/locale/in-ID/configure.ini
+++ b/locale/in-ID/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/it/configure.ini b/locale/it/configure.ini
index 5d16b9360..b9094ca66 100755
--- a/locale/it/configure.ini
+++ b/locale/it/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "Controllo passato."
 ; system_component.php line: 1041
 system_component_using_local_config = "Usando configs/local_config.php la Cartella di Lavoro sopra potrebbe non funzionare."
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/ja/configure.ini b/locale/ja/configure.ini
index 26b550c76..d10637623 100755
--- a/locale/ja/configure.ini
+++ b/locale/ja/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/kn/configure.ini b/locale/kn/configure.ini
index c3bbee022..e16adc613 100755
--- a/locale/kn/configure.ini
+++ b/locale/kn/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "ಪರಿಶೀಲನೆ ತೇರ್ಗಡೆ
 ; system_component.php line: 1041
 system_component_using_local_config = "configs/local_config.php ಉಪಯೋಗದಲ್ಲಿದೆ, ಅದರಿಂದ ಮೇಲಿನ ಕಾರ್ಯ ನಿರ್ದೇಶಿಕೆಯನ್ನು ಬದಲಾವಣೆ ನಿಷ್ಕ್ರಿಯವಾಗಬಹುದು "
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/ko/configure.ini b/locale/ko/configure.ini
index e091dcfe0..9f032f3c7 100755
--- a/locale/ko/configure.ini
+++ b/locale/ko/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
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-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
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 groupfeed_element_delete = ""
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-; groupfeed_element.php line: 190
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 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
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 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
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 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
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-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
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-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/pl/configure.ini b/locale/pl/configure.ini
index e66618667..38b0733b2 100755
--- a/locale/pl/configure.ini
+++ b/locale/pl/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
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-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
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 groupfeed_element_delete = ""
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-; groupfeed_element.php line: 190
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 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
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-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/pt/configure.ini b/locale/pt/configure.ini
index 580e565f3..ce5e91b11 100755
--- a/locale/pt/configure.ini
+++ b/locale/pt/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
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-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/ru/configure.ini b/locale/ru/configure.ini
index 126968c40..e1e5baa53 100755
--- a/locale/ru/configure.ini
+++ b/locale/ru/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/te/configure.ini b/locale/te/configure.ini
index 9b3514707..bd8cc0f8f 100755
--- a/locale/te/configure.ini
+++ b/locale/te/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
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-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
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+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/te/statistics.txt b/locale/te/statistics.txt
index fe8cd74a8..b046d72ad 100755
--- a/locale/te/statistics.txt
+++ b/locale/te/statistics.txt
@@ -1 +1 @@
-d:7;
\ No newline at end of file
+d:6;
\ No newline at end of file
diff --git a/locale/th/configure.ini b/locale/th/configure.ini
index 492ea49aa..0bcc62fb5 100755
--- a/locale/th/configure.ini
+++ b/locale/th/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/tr/configure.ini b/locale/tr/configure.ini
index 5076229be..b59ca4d2a 100755
--- a/locale/tr/configure.ini
+++ b/locale/tr/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = ""
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/vi-VN/configure.ini b/locale/vi-VN/configure.ini
index e3d8788dc..fe2c66031 100755
--- a/locale/vi-VN/configure.ini
+++ b/locale/vi-VN/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "Kiểm tra được th&ocirc;ng qua"
 ; system_component.php line: 1041
 system_component_using_local_config = ""
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/locale/zh-CN/configure.ini b/locale/zh-CN/configure.ini
index dcc72b280..9b4388107 100755
--- a/locale/zh-CN/configure.ini
+++ b/locale/zh-CN/configure.ini
@@ -1011,34 +1011,34 @@ system_component_check_passed = "通過檢查"
 ; system_component.php line: 1041
 system_component_using_local_config = "使用當地語言"
 ;
-; group_controller.php line: 272
+; group_controller.php line: 273
 group_controller_missing_fields = ""
 ;
-; group_controller.php line: 280
+; group_controller.php line: 281
 group_controller_page_saved = ""
 ;
-; group_controller.php line: 316
+; group_controller.php line: 317
 group_controller_back = ""
 ;
-; group_controller.php line: 317
+; group_controller.php line: 318
 group_controller_history_page = ""
 ;
-; group_controller.php line: 349
+; group_controller.php line: 351
 group_controller_back = ""
 ;
-; group_controller.php line: 350
+; group_controller.php line: 352
 group_controller_diff_page = ""
 ;
-; group_controller.php line: 362
+; group_controller.php line: 364
 group_controller_page_revert_to = ""
 ;
-; group_controller.php line: 366
+; group_controller.php line: 368
 group_controller_page_reverted = ""
 ;
-; group_controller.php line: 371
+; group_controller.php line: 373
 group_controller_revert_error = ""
 ;
-; group_controller.php line: 419
+; group_controller.php line: 428
 group_controller_main = ""
 ;
 ; machine_controller.php line: 174
@@ -1789,52 +1789,52 @@ groupfeed_element_comment = ""
 ; groupfeed_element.php line: 147
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 173
+; groupfeed_element.php line: 174
 groupfeed_element_edit = ""
 ;
-; groupfeed_element.php line: 178
+; groupfeed_element.php line: 179
 groupfeed_element_delete = ""
 ;
-; groupfeed_element.php line: 190
+; groupfeed_element.php line: 191
 groupfeed_element_num_posts = ""
 ;
-; groupfeed_element.php line: 214
+; groupfeed_element.php line: 215
 groupfeed_element_comment = ""
 ;
-; groupfeed_element.php line: 221
+; groupfeed_element.php line: 222
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 295
+; groupfeed_element.php line: 296
 groupfeed_element_add_comment = ""
 ;
-; groupfeed_element.php line: 300
+; groupfeed_element.php line: 301
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 327
+; groupfeed_element.php line: 328
 groupfeed_element_start_thread = ""
 ;
-; groupfeed_element.php line: 330
+; groupfeed_element.php line: 331
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 336
+; groupfeed_element.php line: 337
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 341
+; groupfeed_element.php line: 342
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 371
+; groupfeed_element.php line: 372
 groupfeed_element_edit_post = ""
 ;
-; groupfeed_element.php line: 374
+; groupfeed_element.php line: 375
 groupfeed_element_subject = ""
 ;
-; groupfeed_element.php line: 379
+; groupfeed_element.php line: 380
 groupfeed_element_post = ""
 ;
-; groupfeed_element.php line: 385
+; groupfeed_element.php line: 386
 groupfeed_element_save = ""
 ;
-; groupfeed_element.php line: 414
+; groupfeed_element.php line: 415
 groupfeed_element_no_longer_update = ""
 ;
 ; machinelog_element.php line: 61
@@ -3340,7 +3340,7 @@ wiki_view_wiki_page_list = ""
 wiki_view_filter_or_create = ""
 ;
 ; wiki_view.php line: 293
-wiki_element_search = ""
+wiki_element_go = ""
 ;
 ; wiki_view.php line: 297
 wiki_view_create_page = ""
@@ -3348,28 +3348,28 @@ wiki_view_create_page = ""
 ; wiki_view.php line: 334
 wiki_view_back = ""
 ;
-; wiki_view.php line: 347
-wiki_view_diff_current = ""
+; wiki_view.php line: 349
+wiki_view_difference = ""
 ;
-; wiki_view.php line: 348
-wiki_view_diff_next = ""
+; wiki_view.php line: 355
+wiki_view_go = ""
 ;
-; wiki_view.php line: 353
-wiki_view_diff_current = ""
+; wiki_view.php line: 373
+wiki_view_diff_first = ""
 ;
-; wiki_view.php line: 356
-wiki_view_diff_next = ""
+; wiki_view.php line: 376
+wiki_view_diff_second = ""
 ;
-; wiki_view.php line: 362
+; wiki_view.php line: 381
 wiki_view_edited_by = ""
 ;
-; wiki_view.php line: 366
+; wiki_view.php line: 385
 wiki_view_page_len = ""
 ;
-; wiki_view.php line: 368
+; wiki_view.php line: 387
 wiki_view_revert = ""
 ;
-; wiki_view.php line: 371
+; wiki_view.php line: 390
 wiki_view_revert = ""
 ;
 ; /Applications/MAMP/htdocs/git/yioop//lib/indexing_plugins
diff --git a/models/group_model.php b/models/group_model.php
index bbb6d3fb3..aa5e27b59 100644
--- a/models/group_model.php
+++ b/models/group_model.php
@@ -656,7 +656,7 @@ class GroupModel extends Model
                 MIN(G.OWNER_ID) AS OWNER_ID,
                 MIN(G.MEMBER_ACCESS) AS MEMBER_ACCESS,
                 MIN(G.GROUP_NAME) AS GROUP_NAME, MIN(P.USER_NAME) AS USER_NAME,
-                MIN(P.USER_ID) AS USER_ID ";
+                MIN(P.USER_ID) AS USER_ID, MIN(GI.TYPE) AS TYPE";
         } else {
             $group_by = "";
             $select = "SELECT DISTINCT GI.ID AS ID,
@@ -665,7 +665,7 @@ class GroupModel extends Model
                 GI.PUBDATE AS PUBDATE, G.OWNER_ID AS OWNER_ID,
                 G.MEMBER_ACCESS AS MEMBER_ACCESS,
                 G.GROUP_NAME AS GROUP_NAME, P.USER_NAME AS USER_NAME,
-                P.USER_ID AS USER_ID ";
+                P.USER_ID AS USER_ID, GI.TYPE AS TYPE ";
         }
         $sql = "$select
             FROM GROUP_ITEM GI, GROUPS G, USER_GROUP UG, USERS P
diff --git a/views/elements/groupfeed_element.php b/views/elements/groupfeed_element.php
index 6e1488345..1298268f3 100644
--- a/views/elements/groupfeed_element.php
+++ b/views/elements/groupfeed_element.php
@@ -165,7 +165,8 @@ class GroupfeedElement extends Element implements CrawlConstants
                 if($page["MEMBER_ACCESS"] == GROUP_READ_WRITE &&
                     $page['USER_ID'] != "" && isset($_SESSION['USER_ID']) &&
                     ($page['USER_ID'] == $_SESSION['USER_ID'] ||
-                    $_SESSION['USER_ID'] == ROOT_ID)) {
+                    $_SESSION['USER_ID'] == ROOT_ID) &&
+                    $page['TYPE'] != WIKI_GROUP_ITEM) {
                     ?>
                     <div class="float-opposite" ><?php
                     if(!isset($page['NO_EDIT'])) {
diff --git a/views/wiki_view.php b/views/wiki_view.php
index 5237f0a18..6cd64025c 100644
--- a/views/wiki_view.php
+++ b/views/wiki_view.php
@@ -81,7 +81,7 @@ class WikiView extends View
             if($data["MODE"] == $name) { ?>
                 <li class="outer"><b><?php e($translation); ?></b></li>
                 <?php
-            } else if($data["MODE"] == "pages") { ?>
+            } else if(!isset($data["PAGE_NAME"]) || $data["PAGE_NAME"]=="") { ?>
                 <li class="outer"><span class="gray"><?php e($translation);
                 ?></span></li>
                 <?php
@@ -291,7 +291,7 @@ class WikiView extends View
             placeholder="<?php e(tl("wiki_view_filter_or_create"));
             ?>" value="<?php e($data['FILTER'])?>" />
         <button class="button-box" type="submit"><?php
-            e(tl('wiki_element_search')); ?></button>
+            e(tl('wiki_element_go')); ?></button>
         </form>
         <?php
         if($data["FILTER"] != "") {
@@ -333,6 +333,32 @@ class WikiView extends View
                     '&amp;arg=edit&amp;a=wiki&amp;page_name='.
                     $data['PAGE_NAME']); ?>"><?php
             e(tl("wiki_view_back")); ?></a></div>
+        <?php
+        if(count($data['HISTORY']) > 1) { ?>
+            <div>
+            <form id="differenceForm" method="get" action='#'>
+            <input type="hidden" name="c" value="group" />
+            <input type="hidden" name="<?php e(CSRF_TOKEN); ?>" value="<?php
+                e($data[CSRF_TOKEN]); ?>" />
+            <input type="hidden" name="a" value="wiki" />
+            <input type="hidden" name="arg" value="history" />
+            <input type="hidden" name="group_id" value="<?php
+                e($data['GROUP']['GROUP_ID']); ?>" />
+            <input type="hidden" name="page_id" value="<?php
+                e($data["page_id"]); ?>" />
+            <input type="hidden" name="diff" value="1" />
+            <b><?php e(tl('wiki_view_difference')); ?></b>
+            <input type="text" id="diff-1" name="diff1"
+                value="<?php  e($data['diff1']); ?>" /> -
+            <input type="text" id="diff-2" name="diff2"
+                value="<?php  e($data['diff2']); ?>" />
+            <button class="button-box" type="submit"><?php
+                e(tl('wiki_view_go')); ?></button>
+            </form>
+            </div>
+            <?php
+        }
+        ?>
         <div>&nbsp;</div>
         <?php
         $time = time();
@@ -344,22 +370,23 @@ class WikiView extends View
             ?>
             <div class='group-result'>
             <?php
-            if($first && $data['LIMIT'] == 0) { ?>
-                (<b><?php e(tl("wiki_view_diff_current"));
-                    ?></b>| <b><?php e(tl("wiki_view_diff_next")); ?></b>)
+            if(count($data['HISTORY']) > 1) { ?>
+                (<a href="javascript:updateFirst('<?php
+                        e($item['PUBDATE']); ?>');" ><?php
+                    e(tl("wiki_view_diff_first"));
+                    ?></a> | <a href="javascript:updateSecond('<?php
+                        e($item['PUBDATE']);?>');" ><?php
+                    e(tl("wiki_view_diff_second"));
+                    ?></a>)
                 <?php
             } else { ?>
-                (<a href="<?php e($base_query.'&amp;diff2='.
-                    $current."&amp;diff1=".$item['PUBDATE']);?>" ><?php
-                    e(tl("wiki_view_diff_current"));
-                    ?></a> | <a href="<?php e($base_query.'&amp;diff2='.
-                    $next."&amp;diff1=".$item['PUBDATE']);?>" ><?php
-                    e(tl("wiki_view_diff_next"));
-                    ?></a>)
+                (<b><?php e(tl("wiki_view_diff_first"));
+                    ?></b> | <b><?php e(tl("wiki_view_diff_second"));
+                    ?></b>)
                 <?php
             }
             e("<a href='$base_query&show={$item['PUBDATE']}'>" .
-                date("r",$item["PUBDATE"])."</a>. <b>{$item['PUBDATE']}</b>. ");
+                date("c",$item["PUBDATE"])."</a>. <b>{$item['PUBDATE']}</b>. ");
             e(tl("wiki_view_edited_by", $item["USER_NAME"]));
             if(strlen($item["EDIT_REASON"]) > 0) {
                 e("<i>{$item["EDIT_REASON"]}</i>. ");
@@ -383,6 +410,16 @@ class WikiView extends View
             $data['LIMIT'], $data['RESULTS_PER_PAGE'], $data['TOTAL_ROWS']);
         ?>
         </div>
+        <script type="text/javascript">
+        function updateFirst(val)
+        {
+            elt('diff-1').value=val;
+        }
+        function updateSecond(val)
+        {
+            elt('diff-2').value=val;
+        }
+        </script>
         <?php
     }
 }