derive admin flag from roles

src/views/users.js

@@ -26,8 +26,8 @@ angular.module('Application').controller('UsersController', ['$scope', '$locatio
     $scope.userInfo = Client.getUserInfo();
 
     $scope.roles = [
-        { id: '', name: 'User' },
-        { id: 'manage_users', name: 'User Manager' },
+        { id: 'user', name: 'User' },
+        { id: 'usermanager', name: 'User Manager' },
         { id: 'admin', name: 'Administrator' },
         { id: 'owner', name: 'Owner' }
     ];