Fix Fullscreen Window Overflow

[IlChitarrista]

When there is only 1 window in the current workspace it's impossible for it to create an overflow condition. This fixes a bug where opening a fullscreen app on an empty window moves it to the next workspace

[IlChitarrista]

I'm not sure if you have plans to continue working and this but I would like to contribute some small change here and there.
I'm currently looking into another misbehavior with overflow where the window gets moved to a new workspace, the view does as well but the workspace switcher is moved to yet another workspace to the right.

Please keep in mind that I'm very unfamiliar with the stack so I'm using this mostly as a learning experience; Nonetheless, hope this can be helpful.

[IlChitarrista]

I figured the another overflow bug out, I'm currently working on fixing a couple more issues I'm noticing. I can add the extra commit here or on a separate MR if you want.

[IlChitarrista]

Okay, another thing I've managed to fix is a race condition that caused the resize tiling to stop working very often.
Same question as before, it might make sense to include a whole bunch of small fixes.