Most issues were related to BeginLoopedSequence usage and lack of "this." in front of transform helpers.
Enforces at CI.
Will likely need to be bindable when hooked up to settings and actually used.
Depends on https://github.com/ppy/osu-framework/pull/837
- Supersedes https://github.com/ppy/osu/pull/926. - [ ] Depends on https://github.com/ppy/osu-framework/pull/817.
"Never repeat" will not repeat until all songs have been seen by repeatedly pressing F2/Random button