Add Contact form to User registration form; Create settings to select default Contact type
Update for setting to enable Contact form on User Registration form
Change settings language a minor code style tweaks.
Wrap contact form in fieldset.
Adding setings and handling for existing contacts
Remove extraneous & from $contact assignment.
Update setting description and label.
Add TODOs.
Add validation handler to check for existing user. Update submit handler removing logic now handled by validation.
Validation updated to check contact type match. Added field update setting. Update user/fields based on settings.
Remove extra function header info.
User less verbose conditional.
Streamline contact link message and use contact->label() property.
Use bundle() method.
Refactor conditional in the validator.