Not really changing anything, just tightening things down to curb possible funny business.
Adjust pitch switch in DoubleTime and HalfTime mods Also Nightcore and Daycore is now inherit from RateAdjust
Also, mark as nullable for some properties.
IApplicableToSample
Done for consistency with `IApplicableToTrack`.
IApplicableToTrack
ModRateAdjust
IsPlayable
Mod
Allows sharing pause logic with gameplay samples.