Ensure control point group exists after move
Ensure control point group exists after move

If the control point group moved was empty, it would not be created due
to a lack of ControlPointInfo.Add() calls.

NeoAdonis/osu,UselessToucan/osu,peppy/osu,ppy/osu,smoogipoo/osu,ppy/osu,smoogipoo/osu,peppy/osu,ppy/osu,NeoAdonis/osu,smoogipooo/osu,NeoAdonis/osu,peppy/osu,smoogipoo/osu,UselessToucan/osu,UselessToucan/osu,peppy/osu-new