Changelog:
- Add preliminary FFR support in games which render the eye textures separately
- vrperfkit will try and guess when the game is rendering which eye
- if the default guess does not work, the render order of the eyes can be overwritten in the config
- Fix behavior of hotkeys: don't trigger if keys are pressed one after another instead of together
- Add option to configure whether fixed foveated should prefer to keep horizontal or vertical resolution
- Fix a potential issue with some Oculus titles preventing them from submtting frames
- Fix a potential crash in some games (primarily Unreal engine titles)