[Merge] ~aleasto/update-notifier:show-updates-refresh-caches into update-notifier:master

[Alessandro Astone]

The proposal to merge ~aleasto/update-notifier:show-updates-refresh-caches into update-notifier:master has been updated.

    Status: Merged => Needs review

For more details, see:
https://code.launchpad.net/~aleasto/update-notifier/+git/update-notifier/+merge/498504
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Your team Ubuntu Core Development Team is requested to review the proposed merge of ~aleasto/update-notifier:show-updates-refresh-caches into update-notifier:master.