Comment by hello_there

I clicked through to the tiling WM that he was using for KDE and one of the things under "Features" that got my attention was this:

> Support for setting windows to floating or quitting tiling altogether, per-desktop (Meta+Shift+F11) and per-window (Meta-f) (“Meta” refers to the “super” or “windows” key here)

I think this might be worth a try...