[graphics] small improvements (#1351)

* faster texture upload lookup

* fix debug menu

* cleanup

* one more

game/graphics/opengl_renderer/TextureUploadHandler.cpp

@@ -23,6 +23,7 @@ void TextureUploadHandler::render(DmaFollower& dma,
       // note: these uploads may have texture that we need for eye rendering.
       flush_uploads(uploads, render_state);
       render_state->eye_renderer->handle_eye_dma2(dma, render_state, prof);
+      uploads.clear();
     }
 
     auto data = dma.read_and_advance();