Allows song select to load a touch faster, in theory.
Fixes #2575.
# Conflicts: # osu.Game/Beatmaps/Beatmap.cs
Resolves #2306.
# Conflicts: # osu.Game/Beatmaps/RankStatus.cs # osu.Game/Online/API/Requests/SearchBeatmapSetsRequest.cs # osu.Game/Overlays/Direct/FilterControl.cs # osu.Game/Overlays/DirectOverlay.cs