Configure nationalMode for International Telephone Input - jquery.intl-tel-input

Thanks @Luke.Leber for the patch. I would like to see this being a configurable option. I think it makes sense to have a setting on the Elements configuration page that is off by default but that can be switched on to enable nationalMode. I've created a patch for 6.1.x that does that.

Added missing schema for tests

I think it is getting very challenging to support every configuration setting available for advanced elements.

The options for the international telephone element are easily customized via JavaScript.'

The below JavaScript can be added globally or to an individual form (see attached).

// @see https://github.com/jackocnr/intl-tel-input#options
Drupal.webform = Drupal.webform || {};
Drupal.webform.intlTelInput = Drupal.webform.intlTelInput || {};
Drupal.webform.intlTelInput.options = Drupal.webform.intlTelInput.options || {};
Drupal.webform.intlTelInput.options.nationalMode = true;

Thank you. That's a much better solution :)

I ran into a hard blocker with the hiddenInput option that's needed to preserve backwards compatibility with data collection.

I'm fine with maintaining https://www.drupal.org/project/webform_intl_tel_national_mode → for the foreseeable future if this isn't going to be an option in Webform proper.

@Peacog -- feel free to add an issue to https://www.drupal.org/project/webform_intl_tel_national_mode → for turning this on / off -- we can do it with third party settings :)