Bug fix - disable popup

git-svn-id: https://plugins.svn.wordpress.org/simple-contact-form/trunk@974850 b8457f37-d9ea-0310-8a92-e5e31aec5664
update changelog

git-svn-id: https://plugins.svn.wordpress.org/simple-contact-form/trunk@974851 b8457f37-d9ea-0310-8a92-e5e31aec5664