* Fixes a bug that prevented the system to fetch the default provider
because the default_get call was wrong (wrong model + missing
company_id kwarg)
* Displays the amount as a monetary widget (to do that, the amount
must be sent as a float in the controller)
* Display the acquirer 'pre_msg' field to display eventual fees
Payment transactions referenceis have a unique constraint which was problematic when a payment was cancelled from the acquirer's page.
To stick the to DRY principle, I factorized a method that checks for existing references and happens a numerical suffix if necessary.
This was already implemented in website_payment but was moved to payment and used in website_sale.
Joren Van Onder