Add server selection dropdown to settings

data/interfaces/default/notifier_config.html

@@ -518,7 +518,6 @@
                       '(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?)';
     var $email_selectors = $('#email_to, #email_cc, #email_bcc').selectize({
         plugins: ['remove_button'],
-        persist: false,
         maxItems: null,
         render: {
             item: function(item, escape) {