Fix incorrect maniphest.update conduit UI

Summary: Fixes T6254 and renames status as string. Though maybe this should go through formatStringConstants?

Test Plan: Reload Conduit page, see new text.

Reviewers: btrahan, epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6254

Differential Revision: https://secure.phabricator.com/D10637