work around broken images when pasting/attaching on linux
work around broken images when pasting/attaching on linux

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