Fixing E_NOTICE and delaying metabox reg

git-svn-id: https://plugins.svn.wordpress.org/widget-menuizer/trunk@995547 b8457f37-d9ea-0310-8a92-e5e31aec5664
redoing commit

git-svn-id: https://plugins.svn.wordpress.org/widget-menuizer/trunk@995548 b8457f37-d9ea-0310-8a92-e5e31aec5664