- Fix a bug where moving an item to a plugin menu and then deactivating that plugin would cause the moved item to disappear. Now the item will be moved back to its original parent, or to the bottom of the admin menu if the original parent is not available.
- Added extra logging for situations where a menu item gets hidden because a higher-priority item with the same URL is also hidden. Reminder: if there is a top level menu and a sub-menu item with the same URL but differnet permissions, the sub-menu will override the top level menu permissions.

git-svn-id: https://plugins.svn.wordpress.org/admin-menu-editor/trunk@811317 b8457f37-d9ea-0310-8a92-e5e31aec5664