CLOSE_CHAT action calls notifyChatUpdated with the isOpen flag set to false, previously was always true even when closing

react/features/chat/middleware.js

         unreadCount = 0;
 
         if (typeof APP !== 'undefined') {
-            APP.API.notifyChatUpdated(unreadCount, true);
+            APP.API.notifyChatUpdated(unreadCount, false);
         }
 
         dispatch(setActiveModalId());