stack: 'return' in configure for windows not owned by this layout
stack: 'return' in configure for windows not owned by this layout

The first check in the configure function tries to find the window in
the stacks, and if it's not found, it hides it. This commit adds a
return after hiding it, because there's no reason to continue
configuring it.

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