Menu Customizer: whitespace tweak.

git-svn-id: https://plugins.svn.wordpress.org/menu-customizer/trunk@939890 b8457f37-d9ea-0310-8a92-e5e31aec5664
Menu Customizer: version bump, update required core version.

git-svn-id: https://plugins.svn.wordpress.org/menu-customizer/trunk@939891 b8457f37-d9ea-0310-8a92-e5e31aec5664