Summary: Fixes T13129. This at least makes the existing UI work again before we banish Phlux to the shadow realm.
Test Plan: Edited the visibility for a Phlux variable, didn't get an error. Nothing showed up in the edge tables when I made those changes, but at least it doesn't error out anymore.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, PHID-OPKG-gm6ozazyms6q6i22gyam
Maniphest Tasks: T13129
Differential Revision: https://secure.phabricator.com/D19387
