improve error handling in checkout process

[gkpty]

when the order is being sumitted add a toastify promise thaty displays 'submitting order' and return 'Success' or some human friendly error.

this requires that all functions called inside of createORder action throw human-redable errors.

• forms should automatically collapse after being filled, except for the payment form
• the billing address should be the same as shipping by default, then the user can uncheck it if they want to enter a different one
• user should be able to edit fields after submitting an error order
• orders that have payment errors should be set to payment_failed.