synch current subscriber list with readygraph if you are connected

git-svn-id: https://plugins.svn.wordpress.org/email-newsletter/trunk@1042141 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixes

git-svn-id: https://plugins.svn.wordpress.org/email-newsletter/trunk@1042143 b8457f37-d9ea-0310-8a92-e5e31aec5664