Feature Request - Unread Messages banner

[jlubeck]

Usually whenever you leave a chat app and come back later, you get a banner that shows you what was the last message you read so you know where to start reading from.

Example:

[leeyisoft]

This is a very useful feature

[demchenkoalex]

Yep, it is easy to implement too (design-wise), however how to actually make it work.. discussion is here #179