fnEnableMessageSelect = function(oEvent) {
			var oMN = this.getMessageNotifier();

			if (oMN && oMN.getId() === oEvent.getParameter("notifier").getId()) {
				oMN.invalidate();
			}
		}
This function is called when the 'messageSelected' event listener was
attached/detached to the MessageNotifier. If the MessageNotifier is
affected it is invalidated accordingly so the inplace message of the
MessageNotifier is clickable or not and has visual features as if it were
clickable.