label fix

git-svn-id: https://plugins.svn.wordpress.org/refer-a-friend-program-for-woocommerce/trunk@998310 b8457f37-d9ea-0310-8a92-e5e31aec5664
tag 1.4

git-svn-id: https://plugins.svn.wordpress.org/refer-a-friend-program-for-woocommerce/trunk@998312 b8457f37-d9ea-0310-8a92-e5e31aec5664