message: Mark secondaries as submitted so we don't leak secondary command buffers
diff: @@ -461,7 +461,7 @@ void main()
  FinishUsingBackbuffer(cmd, VK_ACCESS_TRANSFER_WRITE_BIT, VK_IMAGE_LAYOUT_GENERAL);
  vkEndCommandBuffer(cmd);
  - Submit(0, 1, {cmd});
  + Submit(0, 1, {cmd}, secondaries);
  Present();
  }
  