[Merge] lp:~ubuntu-mate-dev/debian-cd/ubuntu-mate into lp:~ubuntu-cdimage/debian-cd/ubuntu

[Martin Wimpress]

I resubmitted the merge proposal as requested. Could someone please review, it is essential for Ubuntu MATE.
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https://code.launchpad.net/~ubuntu-mate-dev/debian-cd/ubuntu-mate/+merge/246189
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