Group headings working for navigation menu

Aurora/Frontend/Components/NavigationMenu/NavigationGroupItem.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+
+namespace Aurora.Frontend.Components.NavigationMenu
+{
+    public class NavigationGroupItem : List<NavigationItem>
+    {
+        public NavigationGroupItem()
+        {
+        }
+
+        public NavigationGroupItem(string heading)
+        {
+            GroupHeading = heading;
+        }
+
+        public List<NavigationItem> Items => this;
+        public string GroupHeading { get; set; }
+    }
+}