add empty fake_screens variable to fix tests
add empty fake_screens variable to fix tests

tych0/qtile,flacjacket/qtile,ramnes/qtile,qtile/qtile,frostidaho/qtile,frostidaho/qtile,soulchainer/qtile,ramnes/qtile,zordsdavini/qtile,flacjacket/qtile,qtile/qtile,tych0/qtile,soulchainer/qtile,zordsdavini/qtile