Comment 5 for bug 35009

Update manager should make it clear if the system is up to date or not.

Even though the message proposed above is an improvement, it sends a complex message to the user and does not really tell if we are up to date or not.

The behavior of update manager is currently a problem for computers that are shut down (yes, some people do that). User could have updated a week ago (missing a critical security update this week) and still have update manager saying "System is up to date".

"System is up to date", small "List of updates was reloaded less than 1 day ago and you have installed all updates"
should be shown when system is up to date:
- apt-get update was run less than the set time ago = less than one day by default
and
all those updates are installed (apt-get upgrade)

"Reload list of updates", small: "Press 'Reload' to see new updates published":
- apt-get update has not been run for a while (default 1 day)