Summary: Fixes T7583. We also add `key_room`, which uses isRoom and dateModified since a very common view of rooms is going to be ordered by last updated.
Test Plan: made the conpherence view controller query specify `withIsRoom(true)` and `withIsRoom(false)`. The former made the controller correctly 404 while the latter had no change in functionality.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7583
Differential Revision: https://secure.phabricator.com/D12102
