[Merge] lp:~seb128/software-properties/handle-no-candidate into lp:software-properties

[Sebastien Bacher]

Thanks for the review Michael, I think it goes the other way around there
- install a driver
- upgrade to a new serie
- the driver in ubuntu get dropped/replaced for some reason (think nvidia driver changing number)
- you end up with a locally installed driver that is deprecated/not in the repository

The UI needs to list that driver since it's installed

Not sure what makes the candidate be there or not though, I tried that theory by installing a driver and then disabling "restricted" (and refreshing the apt index) ... apt was only listing the local version (e.g /var/lib/dpkg/info source) but it still had a candidate version, not sure what needs to happen for a locally installed package to not have a candidate?
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https://code.launchpad.net/~seb128/software-properties/handle-no-candidate/+merge/197917
Your team Ubuntu Core Development Team is requested to review the proposed merge of lp:~seb128/software-properties/handle-no-candidate into lp:software-properties.