Fix MCE button in Wordpress 3.9

git-svn-id: https://plugins.svn.wordpress.org/idxpro/trunk@934715 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix MCE button in Wordpress 3.9

git-svn-id: https://plugins.svn.wordpress.org/idxpro/trunk@934716 b8457f37-d9ea-0310-8a92-e5e31aec5664