R1:c85c07012e86

Conpherence - make Hide Column action save user preference

Summary: Fixes T7532.

Test Plan: clicked it, reloaded it, still closed

Reviewers: epriestley, chad

Reviewed By: chad

Subscribers: Korvin, epriestley

Maniphest Tasks: T7532

Differential Revision: https://secure.phabricator.com/D12044