Remove scoped attribute for firefox

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@760168 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add max_tabs filter to convert tab list to select

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@760170 b8457f37-d9ea-0310-8a92-e5e31aec5664