Only show notifications on incoming messages

Author: golf1052

Signal-Windows/Signal/IncomingMessages.cs

@@ -424,7 +424,7 @@ private void HandleSignalMessage(SignalServiceEnvelope envelope, SignalServiceCo
                 }
             }
             Debug.WriteLine("received message: " + message.Content);
-            if (!App.WindowActive)
+            if (!App.WindowActive && type == SignalMessageDirection.Incoming)
             {
                 SendTileNotification(message);
                 SendMessageNotification(message);