added window completer for prompt widget
added window completer for prompt widget

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