Navigation menu is now a reusable component

Aurora/Frontend/Views/BaseViewModel.cs

@@ -0,0 +1,24 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+namespace Aurora.Frontend.Views
+{
+    public class BaseViewModel
+    {
+        public BaseViewModel()
+        {
+        }
+
+        #region INotifyPropertyChanged Implementation
+        public event PropertyChangedEventHandler PropertyChanged;
+        public void OnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            if (PropertyChanged == null)
+                return;
+
+            PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+        #endregion
+    }
+}