Tidy up

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@774608 b8457f37-d9ea-0310-8a92-e5e31aec5664
Set url field to text input type

git-svn-id: https://plugins.svn.wordpress.org/ml-slider/trunk@774611 b8457f37-d9ea-0310-8a92-e5e31aec5664