message: Check ImGui mousecapture and don't propagate event
diff: @@ -1154,6 +1154,10 @@ void VulkanExampleBase::handleMessages(HWND hWnd, UINT uMsg, WPARAM wParam, LPAR
  case WM_MOUSEMOVE:
  {
  bool handled = false;
  +
  + ImGuiIO& io = ImGui::GetIO();
  + handled = io.WantCaptureMouse;
  +
  int32_t posx = LOWORD(lParam);
  int32_t posy = HIWORD(lParam);
  mouseMoved((float)posx, (float)posy, handled);
  