[NUI] Add OverlayLayer to Window's LayersChildren to calculate Layout

Previously, OverlayLayer was not added to Window's LayersChildren so
Layouts inside the OverlayLayer were not calculated.

Now, OverlayLayer is added to Window's LayerChildren to calculate
Layouts inside the OverlayLayer.

diff --git a/src/Tizen.NUI/src/public/Window/Window.cs b/src/Tizen.NUI/src/public/Window/Window.cs
index 8e7f44f..dc80b3f 100755 (executable)
--- a/src/Tizen.NUI/src/public/Window/Window.cs
+++ b/src/Tizen.NUI/src/public/Window/Window.cs
@@ -944,6 +944,7 @@ namespace Tizen.NUI
             {
                 overlayLayer = new Layer(Interop.Window.GetOverlayLayer(SwigCPtr), true);
                 if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
+                LayersChildren?.Add(overlayLayer);
                 overlayLayer.SetWindow(this);
             }
             return overlayLayer;