Add clarifying comment on meaning of UWP web socket disconnect code

            {

                if (this.websocket != null)

                {

                    // Code 1000 indicates that the purpose of the connection has been fulfilled and the connection is no longer needed.

                    this.websocket.Close(1000, "Closed due to user request.");

                    this.websocket = null;

                    this.IsListeningForMessages = false;