Ability to Adjust Payment Gateway Order Easily

[mathetos]

It would be useful to allow users to designate the order by which the payment gateways appear on their donation forms. Currently, it seems all premium Gateways are always put behind the default gateways. Of course, allowing to choose the default gateway is helpful, it's still relatively odd to put "PayPal Pro" at the very end of the list and enabled as the default.

Related ticket: https://givewp.com/support/ticket/pdf-receipt-order-of-payment-methods-on-give-form/

[mathetos]

I didn't see an easy way to use a filter for this, but I assume we'd have to add some kind of sorting logic to the give_get_enabled_payment_gateways() function.

[DevinWalker]

I would love to add the ability to drag-and-drop gateways in the specific order you see fit - globally and per form. Add-on territory? Is this even necessary, or simply nice to have?

[DevinWalker]

Updated title to be more verbose and descript

[DevinWalker]

This is a duplicate of #391