fullscreen handling

[wavexx]

I think it's good to have a binding for fullscreen handling. Even better that this is distinguished from maximization. In fact, I hate how many UIs change (for worse) when toggled in fullscreen mode. I generally use maximization with maximize_hide_bar to have the same effect, but retain the original UI of the program.

I think that the maximization focus handling magic works really well and should apply to fullscreen as well. Currently a window can request fullscreen behavior, but I can cycle focus and see nothing happening. With the raise binding you can actually see that the focused window is changed, but invisible (one of the many reasons I kept raise around.. yes).

I think that attempting to switch focus intentionally should unfullscreen the current window, like maximization does. This removes ambiguity. Similarly, if I request a conflicting window mode (minimize, or maximize), specrtwm should DWIM (and remove the fullscreen toggle).

It's less clear to me what should happen if multiple windows request fullscreen behavior, or what should happen if a new window requests focus. I like the current behavior of maximize. I think it's just right.