message: Fix the menu item text, including tr() call for i18n
diff: @@ -36,7 +36,7 @@ PluginDownloader::PluginDownloader(QObject* parent_)
  m_network(nullptr)
  {
  m_action->setEnabled(true);
  - m_action->setText("Plugin Downloader");
  + m_action->setText(tr("Plugin Downloader..."));
  connect(m_action, SIGNAL(triggered()), SLOT(showDialog()));
  }
  