/**
  * Prevent coupons being added to the Form Settings menu list.
  *
  * @param array $tabs Contains the properties for each tab: name, label and query.
  * @param integer $form_id The ID of the current form.
  *
  * @return array
  */
 public function add_form_settings_menu($tabs, $form_id)
 {
     if ($this->_slug != 'gravityformscoupons') {
         return parent::add_form_settings_menu($tabs, $form_id);
     } else {
         return $tabs;
     }
 }