Fixed override

Author: clackner-gpa

Source/Libraries/GSF.Web/Model/ModelController.cs

@@ -163,7 +163,7 @@ public ModelController()
         #region [ Properties ]
         protected bool ViewOnly { get; } = false;
         protected bool AllowSearch { get; } = false;
-        protected bool ReturnPivots { get; set; } = false;
+        protected virtual bool ReturnPivots { get; set; } = false;
         protected string CustomView { get; } = "";
         protected string PrimaryKeyField { get; set; } = "ID";
         protected string ParentKey { get; set; } = "";