Image widget: support installation in vertical bars
Image widget: support installation in vertical bars

Addresses #573

nxnfufunezn/qtile,rxcomm/qtile,zordsdavini/qtile,soulchainer/qtile,qtile/qtile,StephenBarnes/qtile,soulchainer/qtile,himaaaatti/qtile,farebord/qtile,kynikos/qtile,flacjacket/qtile,de-vri-es/qtile,qtile/qtile,cortesi/qtile,xplv/qtile,andrewyoung1991/qtile,de-vri-es/qtile,tych0/qtile,ramnes/qtile,jdowner/qtile,aniruddhkanojia/qtile,kopchik/qtile,andrewyoung1991/qtile,aniruddhkanojia/qtile,flacjacket/qtile,apinsard/qtile,rxcomm/qtile,tych0/qtile,ramnes/qtile,zordsdavini/qtile,nxnfufunezn/qtile,himaaaatti/qtile,w1ndy/qtile,apinsard/qtile,kseistrup/qtile,dequis/qtile,dequis/qtile,cortesi/qtile,kseistrup/qtile,frostidaho/qtile,jdowner/qtile,xplv/qtile,kopchik/qtile,StephenBarnes/qtile,kynikos/qtile,w1ndy/qtile,farebord/qtile,frostidaho/qtile