Maniphest / Workboards - show workboard column when adding a project to a task

Summary: Fixes T6471. This makes adding projects to tasks have better workflow towards boards; without it, you have to click project -> board -> do stuff on board as opposed to column -> do stuff on board.

Test Plan: added and removed projets. saw column listed parenthetcally when expected

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6471

Differential Revision: https://secure.phabricator.com/D11260