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

[Iain Lane]

Review: Needs Fixing

ca2205311 debian/patches: Refresh indexes
fcdf97d88 debian/patch: Destroy compositor window actors list on destruction
48a697817 randr-scaling: Fix a crash computing primary monitor scale

Nope, we'll get these via mutter 3.32.1-2 that I'm uploading to experimental.
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https://code.launchpad.net/~3v1n0/ubuntu/+source/mutter/+git/mutter/+merge/366666
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