Begin modularizing profile panel/link construction

Summary: Ref T10054. This has no product impact, but prepares us for customizable side nav on "profiles" (today, projects; probably users some day; and maybe other stuff down the road).

Test Plan: Clicked all links on a profile, everything was exactly the same as before.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T10054

Differential Revision: https://secure.phabricator.com/D15007

src/applications/project/controller/PhabricatorProjectBoardController.php

@@ -6,7 +6,7 @@ abstract class PhabricatorProjectBoardController
   public function buildIconNavView(PhabricatorProject $project) {
     $id = $project->getID();
     $nav = parent::buildIconNavView($project);
-    $nav->selectFilter("board/{$id}/");
+    $nav->selectFilter(PhabricatorProject::PANEL_WORKBOARD);
     $nav->addClass('project-board-nav');
     return $nav;
   }