[packagekit] Refresh button in update-viewer

[Justin Haygood]

On Wed, 2007-09-26 at 14:10 -0400, Ken VanDine wrote:
>> I would prefer it be a "Check for Updates" button.  Which would go
>> look for updates and re-populate the list.  I also still want a way to
>> click on the icon in the notification tray and view the updates found
>> on the last check without doing a new check.
>
>I think conary is unique in that getting the update list is quite
>complicated. Could we somehow do some client side caching in the backend
>to make it quick?
>
>Richard.

I think most backends (I know zypp does, not sure about others) keep a local
cache of pretty much any "resolveable" (in the case of zypp, a resolveable
is a package, patch, or pattern (group of resolveables similar to categories
but somehow not), 3 very distinct things)