Make MAX_HISTORY because cause can not be public.
Fix OSD fade-in not correctly debouncing
Fix pressing escape too fast causing multiple exit attempts at song select
Fix being able to trigger player before carousel is ready
Causes an eventual crash.
Remove unused age display code
It could potentially never fade in on quick presses.
Fix some possible null reference exceptions
Sync to upstream repo
Fix more instances of osu!mania beatmap conversion failing
Fix menu cursor not highlighting when pressing multiple buttons
Add "Select" action