public function addDefaultIncludes()
    {
        $this->addInclude('start-atk4');

        /* $config['js']['jqueryui']='https://code.jquery.com/ui/1.11.4/jquery-ui.min.js'; // to use CDN */
        if ($v = $this->app->getConfig('js/versions/jqueryui', null)) {
            $v = 'jquery-ui-'.$v;
        } else {
            $v = $this->app->getConfig('js/jqueryui', 'jquery-ui-1.11.4.min');  // bundled jQueryUI version
        }

        $this->addInclude($v);

        $this->addInclude('ui.atk4_loader');
        $this->addInclude('ui.atk4_notify');
        $this->addInclude('atk4_univ_basic');
        $this->addInclude('atk4_univ_jui');
    }