/**
  * Defines the message for uploading files
  * 
  * @return string
  */
 protected function getUploadFileMessage()
 {
     $filesize = \XLite\Core\Converter::getUploadFileMaxSize();
     return static::t('The maximum file size that can be uploaded: X', array('upload_max_filesize' => \XLite\Core\Converter::convertShortSizeToHumanReadable($filesize)));
 }