Sync to 963bc542a895dae4bf9e92c5dd0e11d2a70e5b9f

git-svn-id: https://plugins.svn.wordpress.org/menu-item-custom-fields/trunk@861885 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add missing doc

git-svn-id: https://plugins.svn.wordpress.org/menu-item-custom-fields/trunk@861892 b8457f37-d9ea-0310-8a92-e5e31aec5664
Sync to 38c88a2c4db20856b17d5d2732415dcacb2617ce


git-svn-id: https://plugins.svn.wordpress.org/menu-item-custom-fields/trunk@862450 b8457f37-d9ea-0310-8a92-e5e31aec5664
Sync to 74dc4269b48221bbca0e7ba4bbf2829f742e1b7c


git-svn-id: https://plugins.svn.wordpress.org/menu-item-custom-fields/trunk@862451 b8457f37-d9ea-0310-8a92-e5e31aec5664