They will not only contract if the user chooses to have them contract
(new setting in the `View` menu) or if the game isn't wide enough to
allow full interaction with the playfield while they are expanded.
Addressess https://github.com/ppy/osu/discussions/28970.
Broke due to something changing in the way we handle realm things in the
carousel. The deselection happens in `updateBeatmapSet` so we need to
store / check the original selection before this occurs.
Doesn't seem this had test coverage? Probably implies that the overhead
of adding a test was very large, so maybe best to leave it that way.