Add a hook for group action list

EVENTS.txt

@@ -1082,3 +1082,11 @@ EndInterpretCommand: Before running a command
 - $user: User who issued the command
 - $result: Resulting command
 
+StartGroupActionsList: Start the list of actions on a group profile page (after <ul>, before first <li>)
+- $action: action being executed (for output and params)
+- $group: group for the page
+
+EndGroupActionsList: End the list of actions on a group profile page (before </ul>, after last </li>)
+- $action: action being executed (for output and params)
+- $group: group for the page
+

actions/showgroup.php

@@ -303,6 +303,7 @@ class ShowgroupAction extends GroupDesignAction
         // TRANS: Group actions header (h2). Text hidden by default.
         $this->element('h2', null, _('Group actions'));
         $this->elementStart('ul');
+        if (Event::handle('StartGroupActionsList', array($this, $this->group))) {
             $this->elementStart('li', 'entity_subscribe');
             if (Event::handle('StartGroupSubscribe', array($this, $this->group))) {
                 if ($cur) {
@@ -323,6 +324,8 @@ class ShowgroupAction extends GroupDesignAction
                 $df->show();
                 $this->elementEnd('li');
             }
+            Event::handle('EndGroupActionsList', array($this, $this->group));
+        }
         $this->elementEnd('ul');
         $this->elementEnd('div');
     }