added setting on plugging page

git-svn-id: https://plugins.svn.wordpress.org/multimedia-customer-feedback/trunk@856032 b8457f37-d9ea-0310-8a92-e5e31aec5664
add icon to plugin

git-svn-id: https://plugins.svn.wordpress.org/multimedia-customer-feedback/trunk@856808 b8457f37-d9ea-0310-8a92-e5e31aec5664