Rename all ProfilePanels into ProfileMenuItems

Summary: Ref T11957.

Test Plan:
  - Viewed an existing project profile.
  - Viewed a user profile.
  - Created a new project.
  - Edited a profile menu.
  - Added new profile items.
  - Grepped for renamed symbols.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T11957

Differential Revision: https://secure.phabricator.com/D17028

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -170,7 +170,7 @@ final class PhabricatorProjectBoardViewController
       }
 
       $nav = $this->getProfileMenu();
-      $nav->selectFilter(PhabricatorProject::PANEL_WORKBOARD);
+      $nav->selectFilter(PhabricatorProject::ITEM_WORKBOARD);
 
       $crumbs = $this->buildApplicationCrumbs();
       $crumbs->addTextCrumb(pht('Workboard'));
@@ -936,7 +936,7 @@ final class PhabricatorProjectBoardViewController
     if ($set_default) {
       $this
         ->getProfileMenuEngine()
-        ->adjustDefault(PhabricatorProject::PANEL_WORKBOARD);
+        ->adjustDefault(PhabricatorProject::ITEM_WORKBOARD);
     }
 
     if ($request->isFormPost()) {