In an application which allows 2 people to chat with each other in indiviual windows,
if user 1 closes the chat window, should user 2 be notified that user 1 closed the chat? (e.g User 1 Closed Chat message)
Or should user 2 only be notified when user 1 logs out of the application where the chat is contained? (e.g User 1 has logged out)