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/PhabricatorProjectViewController.php

@@ -18,13 +18,13 @@ final class PhabricatorProjectViewController
     $project = $this->getProject();
 
     $engine = $this->getProfileMenuEngine();
-    $default = $engine->getDefaultPanel();
+    $default = $engine->getDefaultItem();
 
     switch ($default->getBuiltinKey()) {
-      case PhabricatorProject::PANEL_WORKBOARD:
+      case PhabricatorProject::ITEM_WORKBOARD:
         $controller_object = new PhabricatorProjectBoardViewController();
         break;
-      case PhabricatorProject::PANEL_PROFILE:
+      case PhabricatorProject::ITEM_PROFILE:
       default:
         $controller_object = new PhabricatorProjectProfileController();
         break;