Move filter tab item hierarchy construction to BDL
Move filter tab item hierarchy construction to BDL

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