[Qtile] I spent way too much time on this.

It might not look like anything special, but I spent an embarrassing number of hours on this rice, mostly on the non-graphical user interactions. The layout is a custom master-stack implementation, the groupbox widget is an almost complete reimplementation to support a more flexible styling on multihead systems, the Nvidia GPU monitor widget is completely my own, there are popups and context menus out the ass, and there is a persistence module that saves dynamic data (like layouts and group names) between sessions.

Tomorrow I'm moving to Wayland and I might not have the patience to get Qtile running again.