Implement bar option: mode <dock|hide|invisible>
Implement bar option: mode <dock|hide|invisible>

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