Add CCs to Phriction Edit page

Summary: Fixes T4099. Allows prepopulating CCs when building Phriction pages.

Test Plan: Add notchad, remove notchad.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T4099

Differential Revision: https://secure.phabricator.com/D14042