[Merge] lp:~mterry/update-manager/group-by-applications into lp:update-manager

[Michael Terry]

This is superceded by https://code.launchpad.net/~software-updates-spec/update-manager/group-by-applications/+merge/144362
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https://code.launchpad.net/~mterry/update-manager/group-by-applications/+merge/144046
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~mterry/update-manager/group-by-applications into lp:update-manager.