Hello -- is there a way to sort the automatically-generated list of collaborators in a User field? We have an interface where collaborators can create a new task and assign a task owner via a User field. The users appear to be in the order they were added to the base. It would be a lot easier for them if the User field could be alphabetized but I'm not seeing that option when editing the field (screenshot attached). What am I missing?

Thanks for any help!