R1:b2cbb8f2ee53

Update Fund for EditEngine commenting

Summary: Ref T12685. Moves Fund to EditEngine commenting.

Test Plan: View an old Fund, leave a comment, add a subscriber.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12685

Differential Revision: https://secure.phabricator.com/D17857