Run Maniphest Conduit writes through new editor
Summary: Ref T2217. Swap the editors for the Conduit writes.
Test Plan: Made a bazillion Conduit calls, saw tasks updated appropriately.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran
Maniphest Tasks: T2217
Differential Revision: https://secure.phabricator.com/D7082