Code review comment for lp:~seb128/update-manager/livepatch-settings-installed

Ok, I finally got to revisit that patch, as your comment pointed out checking for a .desktop from the same source wasn't really useful. What software-properties is doing [1] is to check that the online accounts are available or not. There is already a condition on software-properties to be available, so the change as suggested now show allow the UIs to have a synced state

[1] https://git.launchpad.net/software-properties/tree/softwareproperties/gtk/utils.py#n50