Show unread messages since last login

Show divider for unread messages seems to work for messages since I've logged in and any new messages I receive will cause the relevant room to be highlighted, but when I log in I need to look through all rooms to see which contain messages that I missed while logged off. Slack not only highlights which rooms have new messages, but takes me to the last location that I was on in the room, so that I can easily read from that point down to see all new messages.