add button state aliases “.is-*”
add button state aliases “.is-*”

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