/**
  * Display the file upload form
  * @param $args array
  * @param $request PKPRequest
  * @return string Serialized JSON object
  */
 function displayFileForm(&$args, &$request)
 {
     $templateMgr =& TemplateManager::getManager();
     $templateMgr->assign('isEditing', true);
     return parent::displayFileForm($args, $request);
 }