/**
  * command for processing the submitted feedback editing form.
  * first it validates the submitted values.
  * - in case of successfull validation it saves the properties and redirects to either form presentation again,
  *   or to the syncWithOriginal form for question
  * - in case of failed validation it renders the form with post values and error info to the content area again
  * 
  * @access private
  */
 private function saveCmd()
 {
     $form = $this->buildForm();
     $form->setValuesByPost();
     if ($form->checkInput()) {
         $this->feedbackOBJ->saveGenericFormProperties($form);
         $this->feedbackOBJ->saveSpecificFormProperties($form);
         $this->questionOBJ->cleanupMediaObjectUsage();
         if ($this->isSyncAfterSaveRequired()) {
             ilUtil::sendSuccess($this->lng->txt('saved_successfully'), true);
             $this->ctrl->redirect($this, self::CMD_SHOW_SYNC);
         }
         ilUtil::sendSuccess($this->lng->txt('saved_successfully'), true);
         $this->ctrl->redirect($this, self::CMD_SHOW);
     }
     ilUtil::sendFailure($this->lng->txt('form_input_not_valid'));
     $this->tpl->setContent($this->ctrl->getHTML($form));
 }