Added menu button to access group consistency check

lib.php

@@ -493,6 +493,7 @@ function mod_vpl_get_fontawesome_icon_map() {
             'mod_vpl:grade' => 'fa-check-circle',
             'mod_vpl:previoussubmissionslist' => 'fa-history',
             'mod_vpl:modulenameplural' => 'fa-list-ul',
+            'mod_vpl:checkgroups' => 'fa-group',
             'mod_vpl:description' => 'fa-tasks',
             'mod_vpl:similarity' => 'fa-clone',
             'mod_vpl:submissionslist' => 'fa-list-ul',
@@ -656,6 +657,8 @@ function vpl_extend_settings_navigation(settings_navigation $settings, navigatio
         vpl_navi_node_create($vplnode, 'modulenameplural',
                 new moodle_url( '/mod/vpl/index.php', array ('id' => $PAGE->cm->course)), $fkn);
 
+        vpl_navi_node_create($vplnode, 'checkgroups',
+                new moodle_url( '/mod/vpl/views/checkvpls.php', array ('id' => $PAGE->cm->course)), $fkn);
     }
 }