Revert "Refactor Menu.UpdateAfterChildren"
Revert "Refactor Menu.UpdateAfterChildren"

This reverts commit dc54339de1764e95488cdc90fa39600678008338.

Tom94/osu-framework,EVAST9919/osu-framework,peppy/osu-framework,DrabWeb/osu-framework,ppy/osu-framework,EVAST9919/osu-framework,ppy/osu-framework,ZLima12/osu-framework,Tom94/osu-framework,peppy/osu-framework,ppy/osu-framework,EVAST9919/osu-framework,DrabWeb/osu-framework,ZLima12/osu-framework,smoogipooo/osu-framework,DrabWeb/osu-framework,smoogipooo/osu-framework,peppy/osu-framework,EVAST9919/osu-framework