here are the steps of when it was used:

1. go to a thread
2. receive a message for another thread
3. click the notification

=> we were going to thread list before going to the new thread

I don't remember what happens with the new code, I think we're going to the new thread without moving to the thread-list. I planned to be smarter in the Navigation sliding algorithm, so we can put it back in a follow-up patch if UX still wants it. Does that sound good?