fix issue with element search

Co-authored-by: Cody Robibero <cody@robibe.ro>

MediaBrowser.Plugins.SmtpNotifications/Configuration/config.html

@@ -169,7 +169,7 @@
                     var page = this;
 
                     ApiClient.getUsers().then(function (users) {
-                        document.getElementById('#selectUser').innerHTML = users.map(function (user) {
+                        document.getElementById('selectUser').innerHTML = users.map(function (user) {
                             return '<option value="' + user.Id + '">' + user.Name + '</option>';
                         });
                     });