Better explain waiting list position #116
Description
Currently, the waiting list position is shown in the registration details, but it is not immediately obvious what it means. We better explained it here, but it would be good to move that explanation into Arta (maybe in the about page, or a new FAQ page or so) and add a link to that from where the position is shown (maybe with a nice question mark icon, or a small "what does this mean?" link or so.