message: Don't wait for Wayland
  This allows to run at full speed in MAILBOX mode.
diff: @@ -414,7 +414,13 @@ void VulkanExampleBase::renderLoop()
  viewUpdated = false;
  viewChanged();
  }
  - wl_display_dispatch(display);
  +
  + while (wl_display_prepare_read(display) != 0)
  + wl_display_dispatch_pending(display);
  + wl_display_flush(display);
  + wl_display_read_events(display);
  + wl_display_dispatch_pending(display);
  +
  render();
  frameCounter++;
  auto tEnd = std::chrono::high_resolution_clock::now();
  @@ -1494,6 +1500,7 @@ void VulkanExampleBase::initWaylandConnection()
  { registryGlobalCb, registryGlobalRemoveCb };
  wl_registry_add_listener(registry, &registry_listener, this);
  wl_display_dispatch(display);
  + wl_display_roundtrip(display);
  if (!compositor || !shell || !seat)
  {
  std::cout << "Could not bind Wayland protocols!\n";
  