simplify ButtonGroup component
simplify ButtonGroup component

shaunstanislaus/elemental,VictorBjelkholm/elemental,teaualune/elemental,zhiephie/elemental,apisandipas/elemental,averted/elemental,beni55/elemental,xaadim/elemental,kidaa/elemental,w01fgang/elemental,hnq90/elemental,khacluan/elemental,MunGell/elemental,w01fgang/elemental,zackify/elemental,LennyBoyatzis/elemental,jerrysdesign/elemental,LennyBoyatzis/elemental,VictorBjelkholm/elemental,CallMeFabioo/elemental,kidaa/elemental,teaualune/elemental,zackify/elemental,xaadim/elemental,bradparks/elemental,dmsnell/elemental,LegNeato/elemental,hnq90/elemental,w01fgang/elemental,MunGell/elemental,MunGell/elemental,elementalui/elemental,elementalui/elemental,beni55/elemental,zhiephie/elemental,averted/elemental,shaunstanislaus/elemental,pairyo/elemental,kof/elemental,jerrysdesign/elemental,khacluan/elemental,Filsh/elemental-themeable,bs1180/elemental,LegNeato/elemental,Filsh/elemental-themeable,pairyo/elemental,dmsnell/elemental,bs1180/elemental,CallMeFabioo/elemental,bradparks/elemental,kof/elemental,apisandipas/elemental,elementalui/elemental