Add drupal:field_ui as it might confuse users, if it's missing (UX)....
requested to merge issue/commerce_checkout_order_fields-3396276:3396276-add-fields-ui-dependency into 8.x-1.x
Add drupal:field_ui as it might confuse users, if it's missing (UX). Technically it's not required to make this module "work".
Closes #3396276