Ukraine language update

git-svn-id: https://plugins.svn.wordpress.org/official-mailerlite-sign-up-forms/trunk@963776 b8457f37-d9ea-0310-8a92-e5e31aec5664
Swedish language update

git-svn-id: https://plugins.svn.wordpress.org/official-mailerlite-sign-up-forms/trunk@963778 b8457f37-d9ea-0310-8a92-e5e31aec5664