Update the plugin homepage URL.

git-svn-id: https://plugins.svn.wordpress.org/admin-menu-editor/trunk@872899 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove "Pro" from the multisite module name; it's the same for both free and Pro versions.

git-svn-id: https://plugins.svn.wordpress.org/admin-menu-editor/trunk@872900 b8457f37-d9ea-0310-8a92-e5e31aec5664