GUI: status: Flag when booth inaccessible or out of sync (bnc#874168)

When in a geo-cluster:

- Flag a warning on any ticket for which we can't determine booth's idea
  of a leader (e.g.: `booth client list` fails).
- Flag a warning on any granted ticket where the booth leader isn't the
  IP address of this site.
- Do a full refresh every minute even if the CIB hasn't changed to pick
  up any possible drift in booth state that doesn't result in a CIB
  update.

Signed-off-by: Tim Serong <tserong@suse.com>