Swap the meanings of "margin" and "padding" in the groupbox context.
Swap the meanings of "margin" and "padding" in the groupbox context.

This matches the CSS usage.

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