group: Catch and avoid propagating exceptions in layout()
group: Catch and avoid propagating exceptions in layout()

Just a way to prevent misbehaving layouts from breaking more than they
should.

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