Update projects to target .NET core 2.2
Polling component
Fix crash when changing beatmap toggles at loading screen
Fix crash on exiting player during results transition
Fix API getting stuck in connecting state on some exceptions
Fix reverting to default skin via settings button causing a hard crash
Move ModOverlay to SongSelect
Update framework and other nuget packages
Select channel selector when no channel is selected
Fix update code crashing when no internet connection is available
Change statistics to be int for now
Fix GetWorkingBeatmap potentially loading same beatmap twice
This could be seen when using the previous/next buttons in the MusicController while at song select.
Make hud overlay's content always present to fix input issues
Fix home button being cancelled by mod select
Add 1ms offset to controlpoint lookup times
Fix loading scores on profile pages potentially causing long blocking operations
Fix hard crash due to out-of-order chat sequencing