Implement `IBeatmapInfo`/`IBeatmapSetInfo` from API beatmap types
APIBeatmapSet.Covers
APIBeatmap
IBeatmapInfo
APIBeatmapSet
IBeatmapSetInfo
nullable
Move online beatmap set info to interface
Remove `APIPlaylistBeatmap` subclass
BeatmapSetOnlineInfo
APIPlaylistBeatmap
Use colour provider theming in text boxes
OverlayColourProvider
OsuTextBox
Fix and improve TestSceneUserProfilePreviousUsernames
Implement realm beatmap importer
Localise toasts
OnlineID
Triggered by toggling Shift+Tab during gameplay.
Use different colours for selection and hover in dropdowns
ToString
OsuDropdown