completed client state invalidation in multi-user environment

Oqtane.Shared/Shared/SiteState.cs

@@ -0,0 +1,11 @@
+using Oqtane.Models;
+
+namespace Oqtane.Shared
+{
+    // this class is used for passing state between components and services, or controllers and repositories
+    public class SiteState
+    {
+        public Alias Alias { get; set; }
+
+    }
+}