Method onMenuZoomToCustom

YUViewLib/src/ui/Mainwindow.h:127–132

      v->zoomTo200(checked);
  }
  void onMenuZoomToCustom(bool checked)
  {
    const auto v = this->getCurrentActiveView();
    if (v)
      v->zoomToCustom(checked);
  }

  void openRecentFile();