[Merge] lp:~ubuntu-mate-dev/ubiquity-slideshow-ubuntu/ubuntu-mate-update into lp:ubiquity-slideshow-ubuntu

[Martin Wimpress]

This is fixed now. Could someone review it please?
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https://code.launchpad.net/~ubuntu-mate-dev/ubiquity-slideshow-ubuntu/ubuntu-mate-update/+merge/251487
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