As this field is defined directly in payment and is displayed on
acquirer form view let us display it in tree view also directly
in payment instead of website payment.
This is a manual forward-port of commit 5f24bf5df7.
* add provider, related on acquirer_id.provider, in order to display
certain piece of information on tx depending on their provider;
* better tx form view and partner address display;
* remove unnecessary notebook on tx form view as it is not used;
* rename Payment Acquirers menu into Payment Methods, easier to
understand;
* acquirer kanban view improved to install / activate / configure them
depending on their state;
* be able to publish / unpublish acquirers without having to wait for
website_payment to add a button;
Thibault Delavallée