When a Phortune subscription has a removed payment method, be more explicit about it
Summary:
Currently, when a payment method is invalid we still render the full name and let you save the form without making changes. This can be confusing.
Instead:
- Render "<Deleted Payment Method>", literally.
- Render an error immediately.
- Prevent the form from being saved without changing the method.
Test Plan:
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D16935