/**
  * Remove message (via ajax)
  */
 public function removeAction()
 {
     $message_id = (int) $this->getRequest()->getParam('message_id', false);
     $user = $this->getRequest()->getParam('user', false);
     $Messages = new Application_Model_Messages();
     $ret = false;
     if ($message_id) {
         $ret = $Messages->removeMessage($message_id);
     }
     if ($user) {
         $ret = $Messages->removeAllMessagesWithUser($user);
     }
     $this->getHelper('json')->sendJson($ret);
 }