Ech, I will hotfix that number issue right now. Thank you! The regex is probably more useful for the text fields, but it's a validation regex for the content o

Ech, I will hotfix that number issue right now. Thank you! The regex is probably more useful for the text fields, but it's a validation regex for the content of the field. We check it both client and server side, to make sure the user-entered content fits it. The "Done" in the lower left is actually purely design at the moment, all it does is take you back to the add fields menu. Someone suggested that we add it in case users are confused about exiting the panel for an individual field.