cd33f5d907
The changes violated too many assumptions on the mutter side. And even if those were addressed, changing the work area when a window enters/leaves fullscreen isn't great, because it will force an expensive relayout on all other windows. This reverts commit cd1102ff30b134e45e9b5ab48318e6a4eae03416. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2223>