This needs some more design for the desired workflow. This particular tooltip is only displayed on a mouse-move event, which can't be generated on a touch surface. I think what we might want to do instead is something similar to googledocs, where the first touch moves the cursor and activates a small pop-over that has a clickable link.

My preference would be to raise that as an issue, and work on it in a new PR so it doesn't hold up this PR. Would this be acceptable to you?