Include object url in object selector selection

Summary: Fixes T6452, provides actual href instead of just #

Test Plan: Control click and open link in new window, is correct task. Click and see item added to selection list.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6452

Differential Revision: https://secure.phabricator.com/D10774