public function __construct(Tracker $tracker, EventManager $event_manager, Tracker_IDisplayTrackerLayout $layout)
 {
     parent::__construct($tracker, $event_manager);
     $this->layout = $layout;
 }
 public function display(Codendi_Request $request, PFUser $current_user)
 {
     $this->current_user = $current_user;
     parent::display($request, $current_user);
 }