container: Fix inner gaps against screen edge.
container: Fix inner gaps against screen edge.

4e554c4c/sway,crondog/sway,1ace/sway,ascent12/sway,taiyu-len/sway,SirCmpwn/sway,crondog/sway,mikkeloscar/sway,1ace/sway,sleep-walker/sway,sleep-walker/sway,colemickens/sway,1ace/sway,taiyu-len/sway,4e554c4c/sway,taiyu-len/sway,colemickens/sway,ascent12/sway,ascent12/sway,johalun/sway,mikkeloscar/sway,ptMuta/sway,colemickens/sway