tooltip if study button inactive
tooltip if study button inactive

holycrepe/anki,eduOS/anki,weihautin/anki,kenjhim/anki,LucasCabello/anki,jkitching/anki,go38/anki,sunclx/anki,hssm/anki,jakesyl/ruby-card,ospalh/libanki3,florianjacob/anki,Arthaey/anki,Stvad/anki,hssm/anki,abeyer/anki,jakesyl/ruby-card,socialpercon/anki-1,subfusc/anki,xuewenfei/anki,weihautin/anki