[NUI] Set Notification Window transparent (#3125)

Notification creates its own Window.
Not to cover the existing view behind Notification Window, Notification
Window's BackgroundColor is set to be transparent.

Co-authored-by: Jaehyun Cho <jae_hyun.cho@samsung.com>

diff --git a/src/Tizen.NUI.Components/Controls/Notification.cs b/src/Tizen.NUI.Components/Controls/Notification.cs
index 3ebe406..04c88ff 100755 (executable)
--- a/src/Tizen.NUI.Components/Controls/Notification.cs
+++ b/src/Tizen.NUI.Components/Controls/Notification.cs
@@ -119,6 +119,7 @@ namespace Tizen.NUI.Components
                     notificationWindow = new Window(null, true)
                     {
                         Type = WindowType.Notification,
+                        BackgroundColor = Color.Transparent,
                     };
                     notificationWindow.Show();
                 }