Workboards - fix broken links on pages accessed via tag

Summary: $this->id wasn't being set in this case so just set it explicitly after we finish loading the project. Fixes T5763.

Test Plan: links were broken no longer!

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T5763

Differential Revision: https://secure.phabricator.com/D10108

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -40,6 +40,7 @@ final class PhabricatorProjectBoardViewController
     }
 
     $this->setProject($project);
+    $this->id = $project->getID();
 
     $column_query = id(new PhabricatorProjectColumnQuery())
       ->setViewer($viewer)