Small update to fix a few things and added a simple powertrain app.
Added Classic Powertrain App (WIP)
- Fixed values erroring when first adding the Classic Menu app (causing options to not be changeable unless you reload the UI)
- Fixed dropdown menu overflowing the "BeamNG Logo Style".
- Fixed not being able to click apps in the right corner of the screen (the overlay of the Classic Menu blocked it even when it was closed)