Merge remote-tracking branch 'aa/issue/ticket-preview-collabs' into features_prs/develop-next

* aa/issue/ticket-preview-collabs:
  fix manage collabs for ticket preview contd
  fix manage collabs popup from ticket preview

include/staff/templates/ticket-preview.tmpl.php

@@ -174,8 +174,8 @@ echo '</div>'; // ticket preview content.
     <br>
     <?php
     echo sprintf('<span><a class="collaborators"
-                            href="#tickets/%d/collaborators">%s</a></span>',
-                            $ticket->getId(),
+                            href="#thread/%d/collaborators">%s</a></span>',
+                            $thread->getId(),
                             $thread && $thread->getNumCollaborators()
                                 ? __('Manage Collaborators') : __('Add Collaborator')
                                 );