Add filter for resource manager selectors

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@894152 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove whitespace

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@894153 b8457f37-d9ea-0310-8a92-e5e31aec5664