[Merge] ~nteodosio/software-properties:xenial-ua into software-properties:ubuntu/xenial

[Nathan Teodosio]

I think I fixed the SVG problem by manually tweaking the <rect> <circle> and <path> parameters in it: https://termbin.com/cy8n.

Once design approves it, I think we are good to go.
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https://code.launchpad.net/~nteodosio/software-properties/+git/software-properties/+merge/448388
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