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

[Iain Lane]

Done, thanks! I think we should probably think about doing a snapshot next time, this is a lot of cherry-picks already.
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https://code.launchpad.net/~3v1n0/ubuntu/+source/mutter/+git/mutter/+merge/369334
Your team Ubuntu Desktop is requested to review the proposed merge of ~3v1n0/ubuntu/+source/mutter:ubuntu/bionic into ~ubuntu-desktop/ubuntu/+source/mutter:ubuntu/bionic.