* Pass the customers previous input (as a paymentOption) to the PS.FC viewcontroller when update finishes
* nit
* Prefer previous customer input to configuration default billing details in the form factory
* Snapshot test for AddPMVC
* Flow defaults to card, add test for a card form + full billing details
* fixups
* Update test to check the update did the right thing, remove todo to test paymentOption preservation -- to hard to do in a unit test b/c it involves user input. Will do this in a UI test later
* fix typo in unrelated test
* improve test
* lint
* add some safety checks to ensure we only restore once and only if the pm type is still valid
* Add test that previous PM input is specific to the PM
* Fix not setting delegate
* lint
b981bc3584
