Minor code cleanup in preparation of WordPress 4.0.


git-svn-id: https://plugins.svn.wordpress.org/wp-approve-user/trunk@979341 b8457f37-d9ea-0310-8a92-e5e31aec5664
Maintain role selection on batch modification.


git-svn-id: https://plugins.svn.wordpress.org/wp-approve-user/trunk@979357 b8457f37-d9ea-0310-8a92-e5e31aec5664