Fixes #1772.
Fix crash when starting play mode with no beatmap
Closes #1767
Hide unnecessary lines on empty BeatmapInfoWedge
Fix beatmap info wedge not showing up when zero beatmaps are loaded
async loads
Fix notification read lamp and notification count
Yet another rework of sound handling in taiko
Add special logic to song select to avoid obvious clipping when notifications are displayed
Add a dialog offering to import beatmaps from stable
Add word wrapping support for popup dialog text
Fix many instances of non-osu-prefixed text classes being used
Quieter notification overlay
Trigger null-selection in SongSelect when the last beatmap is hidden
This avoids `SelectionChanged` potentially being invoked multiple times after `selectedBeatmapSet` is already `null`.
Fix null reference in release builds
Not sure if we will keep this going forward (there will likely be an opaque tab control on the notifications overlay similar to options) but let's go with this for now.
Intro may not be initialised yet
Fix supporter icon appearing incorrectly in user profile header