fix tooltip for inverted color schemes
fix tooltip for inverted color schemes

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