[Merge] ~lamoura/update-notifier:fix-release into update-notifier:master

[Andreas Hasenack]

Review: Approve

This will change all translation strings, but a quick grep shows that at least in the package the "sudo ua status" strings were not translated to begin with.

We can't upload this to kinetic right now because the beta release is tomorrow, but hopefully after that we can.
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https://code.launchpad.net/~lamoura/update-notifier/+git/update-notifier/+merge/430596
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