Dropdown list of apps

git-svn-id: https://plugins.svn.wordpress.org/smart-app-banner/trunk@1053374 b8457f37-d9ea-0310-8a92-e5e31aec5664
Correctly show status messages

git-svn-id: https://plugins.svn.wordpress.org/smart-app-banner/trunk@1053377 b8457f37-d9ea-0310-8a92-e5e31aec5664