Comment 7 for bug 1669584

Ran a git bisect on mutter:

https://github.com/GNOME/mutter/commit/383ba566bd7c2a76d0856015a66e47caedef06b6

confirmed - final git bisect bad displays the above commit

I built a local mutter v2.23.91 package with a reverse patch of that commit. All is well. I really don't understand though the code behind that commit nor the logic in the linked bugzilla report though :(