[packagekit] Refresh button in update-viewer

[Richard Hughes]

On Wed, 2007-09-26 at 15:32 -0400, Ken VanDine wrote:
> Can we cache the results of the last check for updates and use that?
> And of course trash those after the update is completed.  I would also
> like a way for people to kick off a check for updates manually.

Yes, we should do that. Let me put the caching in the engine code and
then this should be easy to do.

Richard.