Fix HR mod affecting original beatmap difficulty
Fixes #2575.
Add ability to bind "back" action; add default mouse binding
Implement osu!mania performance calculator
Fix converted beatmap hitwindows not working correctly
Fix taiko slider multiplier being applied twice
Implement taiko performance calculation
Multiplayer base screen
Fix incorrect namespace of OsuPerformanceCalculator
Speed up beatmap parsing and conversion
Fix hold notes never dying
Screen breadcrumbs
Use a stable sort for hitobjects
Fix conversion tests for ruleset-specific beatmaps not working