June-ta commit

- Added ON/OFF and audio overclip indicators to the Large Mode meter in `AudioTrack`.
- Added `Slider` range guides.
- Added a proper value graphing class called `Graph`.
  - `Timer` is now a sub-class of `Graph`.
  - Renamed `Timer` to `Graph_Time`.
  - Renamed `TimerFPS` to `Graph_FrameRate`
- Performed some code reformatting and restructuring to fix code style and remove redundancy.