fixing bug with combo box

git-svn-id: https://plugins.svn.wordpress.org/smart-forms/trunk@1036040 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed issue

git-svn-id: https://plugins.svn.wordpress.org/smart-forms/trunk@1036042 b8457f37-d9ea-0310-8a92-e5e31aec5664