Inhibit edges when the active window is full screen by default
At the moment we trigger the edges even when the active window is full screen which is unfortunate when running certain games, for example when you're attacking the village at the north-east in Age of Empires and you have the Overview effect on.
This changes the default to inhibit them (like we used to just do for sides but not corners for some reason) and adds a checkbox to restore them even in that case.