message: Correct a spelling mistake
diff: @@ -796,7 +796,7 @@ void FileBrowserDialog::onDownloadFinished(bool success)
  return;
  if(task->httpErrorCode() == 404) {
  - _error = tr("File does not exit");
  + _error = tr("File does not exist");
  } else {
  _error = task->errorString();
  }
  