Various performance improvements around hitobjects
# Conflicts: # osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs # osu.Game/Rulesets/UI/Scrolling/ScrollingPlayfield.cs
Regressed at https://github.com/ppy/osu/commit/50091252e272564807e046b699d6619382a44891#diff-20562da8cde558aacafa9540b97b7975