Oops there was a big speed regression

In v0.6.4.0 there were some speed improvements. But also, the configurable left menu code caused a huge slowdown because it would constantly be reading from a file what the menu size was. The slowdown is worse if you have a slower hard drive I think. Like, 7 times per piano key. It no longer does that. With this change, there are actual performance gains.

Thanks you @OPNA2608 for discovering and pinpointing the regression.