/**
  * Change customizer back button url for our app-theme version
  * @since  1.0.7
  * @param  string  $url Original url
  * @return string       Maybe modified url
  */
 public function change_back_button_url($url)
 {
     if ($url == admin_url('themes.php')) {
         return AppPresser_Admin_Settings::url();
     }
     return $url;
 }