fix text-domain

git-svn-id: https://plugins.svn.wordpress.org/wp-campaign-manager/trunk@1050177 b8457f37-d9ea-0310-8a92-e5e31aec5664
fix comment

git-svn-id: https://plugins.svn.wordpress.org/wp-campaign-manager/trunk@1050179 b8457f37-d9ea-0310-8a92-e5e31aec5664