I'm very disappointed you removed this on mobile. Previously, if you were on, say, the Attire board, there was a link back to the Attire board below the comment box at the bottom of a thread. Now, it is gone. What that means is if I'm several pages into a thread, I have no way of getting back to the Attire board without hitting the back button multiple times, going back out to the general list of boards and getting to Attire from there, or going into my browser history and getting the URL for the Attire board.
Please turn it back on!