I have an app where users have training tracks and I want the users to be able to add courses to their training tracks. In Airtable, the Training Tracks are one table with Courses as a Linked Record field. I want the users to be able to select any of the existing courses they haven’t already taken and add to their training track. How do I do this? I can’t see how to allow the user to link courses to their training track in Softr.