feat: OverlayDialogHost remake: support host with same id in different toplevel. support modal status propagation.

src/Ursa/Controls/Dialog/Options/OverlayDialogOptions.cs

@@ -46,4 +46,8 @@ public class OverlayDialogOptions
     public bool ShowCloseButton { get; set; } = true;
     public bool CanLightDismiss { get; set; }
     public bool CanDragMove { get; set; } = true;
+    /// <summary>
+    /// The hash code of the top level dialog host. This is used to identify the dialog host if there are multiple dialog hosts with the same id. If this is not provided, the dialog will be added to the first dialog host with the same id.
+    /// </summary>
+    public int? TopLevelHashCode { get; set; }
 }