message: Fixed menu rendering bug
diff: @@ -256,7 +256,7 @@ void viewer_glut::impl::imgui_draw(ImDrawData* draw_data)
  {
  glScissor(
  static_cast<int>(clip_rect.x),
  - static_cast<int>(width - clip_rect.w),
  + static_cast<int>(height - clip_rect.w),
  static_cast<int>(clip_rect.z - clip_rect.x),
  static_cast<int>(clip_rect.w - clip_rect.y)
  );
  