[Merge] ~3v1n0/ubuntu/+source/mutter:ubuntu/bionic into ~ubuntu-desktop/ubuntu/+source/mutter:ubuntu/bionic

[Marco Trevisan (Treviño)]

> Also, the fix for bug 1767648 (and hence bug 1779615) is not in disco or
> cosmic yet(?)

For both I'm preparing a landing in disco, don't worry (that's why I'm delaying the fixes on this a bit), so they were planned to land in disco already in the coming upload.
-- 
https://code.launchpad.net/~3v1n0/ubuntu/+source/mutter/+git/mutter/+merge/361811
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