Most issues were related to BeginLoopedSequence usage and lack of "this." in front of transform helpers.
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.
The triggered bool is not even necessary because input is no longer handled after the OverlayContainer's state is set to hidden.