GUI: status: Use yyyy-mm-dd hh:mm:ss format for ticket last granted

Signed-off-by: Tim Serong <tserong@suse.com>
GUI: status: Always show tickets defined in booth config

This ensures Hawk shows all tickets listed in booth config, even if
they're not set in the CIB status section (in this case they'll appear
as "revoked", but show you whatever other information Hawk can get from
`booth client list`.

Signed-off-by: Tim Serong <tserong@suse.com>
Misc: Cib model: Handle unquoted strings in booth.conf (bnc#879604)

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