Summary:
Fixes T7060. Removes some hard-coding.
This assumes that "pages with no durable column" and "pages with no Quicksand" are the same, but that's correct today and I can't come up with a use case where they'd be different offhand.
Test Plan:
- Clicked a revision with column open, got Quicksand navigation.
- Clicked into Conpherence with column open, got real navigation.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7060
Differential Revision: https://secure.phabricator.com/D12036
6fa507987d