Jump to first unread message
When a room with enough unread activity to fill up the screen is opened, the message at the top should be the first unread message, with the new message divider right above it. Currently, we just go to the bottom of available history, with the most recently sent message at the bottom of the window.
(This behaviour was implemented for legacy, we just haven’t gotten around to reimplementing it yet and had no issue to track it)
Edited by Alexandre Franke