Add classic mod for the osu! ruleset
Allow ModDifficultyAdjustment to extend beyond the sane limits of the game
Prevent the default on-click sample from playing for OsuCheckbox
Add local user customisation for freemod mod settings
Use unique sample for edit button click (ButtonSystem)
Update resources with new samples
Add Messagepack support for serialising unknown bindable types
Fix incorrect mod copying behaviour when settings arrive from external change