Conpherence - add ability to change title in the durable column

Summary: Ref T7014.

Test Plan: changed the conpherence title from the column. since i can't get scrolling to work, i inspect the dom to verify the title change transaction showed up properly

Reviewers: epriestley, chad

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T7014

Differential Revision: https://secure.phabricator.com/D12002