small update

ts/components/conversation/Message.tsx

@@ -194,7 +194,7 @@ class MessageInner extends React.PureComponent<Props, State> {
       };
       // as 'checkExpired' is potentially called more than once (componentDidUpdate & componentDidMount),
       //  we need to clear the timeout call to 'setExpired' first to avoid multiple calls to 'setExpired'.
-      clearTimeout(this.expiredTimeout);
+      global.clearTimeout(this.expiredTimeout);
       this.expiredTimeout = setTimeout(setExpired, EXPIRED_DELAY);
     }
   }