DialogOverlay
As seen at https://github.com/ppy/osu/runs/4999391205?check_suite_focus=true, where `DialogOverlay` hasn't loaded in single file yet.
Wait
WaitSafely
BeatmapSetInfo
Metadata
There were very few accesses to this, and after realm they should all be done via the `BeatmapInfo`, so let's remove this.
TestMultiplayerScreenStack
TestMultiplayerComponents
RulesetInfo
OnlineID
ID
IWorkingBeatmap
TestOverlayClosing
OsuGame