Change the `admin-menu` outlet to use a tagName of `li`

app/assets/javascripts/admin/templates/admin.hbs

@@ -23,7 +23,7 @@
           <li>{{#link-to 'admin.api'}}{{i18n 'admin.api.title'}}{{/link-to}}</li>
           <li>{{#link-to 'admin.backups'}}{{i18n 'admin.backups.title'}}{{/link-to}}</li>
         {{/if}}
-        {{plugin-outlet "admin-menu"}}
+        {{plugin-outlet "admin-menu" tagName="li"}}
       </ul>
 
       <div class='boxed white admin-content'>

app/assets/javascripts/discourse/helpers/plugin-outlet.js.es6

@@ -88,20 +88,21 @@ export default function(connectionName, options) {
   if (!_connectorCache) { buildConnectorCache(); }
 
   if (_connectorCache[connectionName]) {
-    var view;
+    var viewClass;
     var childViews = _connectorCache[connectionName];
 
     // If there is more than one view, create a container. Otherwise
     // just shove it in.
     if (childViews.length > 1) {
-      view = Ember.ContainerView.extend({
+      viewClass = Ember.ContainerView.extend({
         childViews: childViews
       });
     } else {
-      view = childViews[0];
+      viewClass = childViews[0];
     }
+
     delete options.fn;  // we don't need the default template since we have a connector
-    return Ember.Handlebars.helpers.view.call(this, view, options);
+    return Ember.Handlebars.helpers.view.call(this, viewClass, options);
   } else if (options.fn) {
     // If a block is passed, render its content.
     return Ember.Handlebars.helpers.view.call(this,