Feature request: mark as un/read button

Currently the only way to mark something as read is to stare for it for a moment and then scroll down and wait a moment again. This takes a long time especially when there are many unreads in a forum and feels annoying when I have already read the forums on another device. Thus I would like there to be buttons to:

• mark chat as read
• mark chat as unread, in case there is something I would like to return to later and have the UI remind me of it with the unread marker.