Redesigned Customer Portals

We've rolled out an update to the layout of all customer portals in response to customer feedback, in order to improve the layout and information density. Functionality remains the same in most cases, with the exception of the Stripe integration on the invoice portal, where we now embed the payment form on the page, rather than redirecting to Stripe checkout (which was previously required as at the time of the first version, there was no support for embedding BACS payments on our site).