some small fixes

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-delivery-notes/trunk@993990 b8457f37-d9ea-0310-8a92-e5e31aec5664
some small fixes

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-delivery-notes/trunk@993992 b8457f37-d9ea-0310-8a92-e5e31aec5664