Since a lot of RTIR code checks Queue::HasRight (particularly on CF right
checks) this was a ton of DB fetches to go get all the Constituency
Queues.  Just having the Constituency CF caused the queries, even if
there were no Queues to find.

This was especially apparent in the REST interface where merely listing
open Incident Reports caused thousands of SELECT main.* from Queues
where Name like 'Incidents - %';