* Add "create an account" option to PayPal setup.
Requires a connected Jetpack and WCS.
* Incorporate account creation into multiple flows.
Consolidate form code as well.
* Empty emails aren't valid.
* Remove defunct manual form render.
* Only validate API credentials if needed.
* Update PayPal settings for account creation flow.
* Add first basic test for PayPal setup task.
* Add more test coverage.
* Add some padding to the create account form.
* Only show "create account" if WCS TOS has been accepted.