[Merge] ~3v1n0/ubuntu/+source/gnome-control-center:ubuntu/xrandr-scaling into ~ubuntu-desktop/ubuntu/+source/gnome-control-center:ubuntu/master

[Sebastien Bacher]

Review: Approve

Thanks Marco, looks fine to me!
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https://code.launchpad.net/~3v1n0/ubuntu/+source/gnome-control-center/+git/gnome-control-center/+merge/365623
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