[FIX] payment: allow creating new payment methods from the provider

When browsing a payment provider's payment methods, the "New" button was
disabled because the action did not allow Kanban views.

closes odoo/odoo#148865

Signed-off-by: Valentin Chevalier <vcr@odoo.com>

addons/payment/models/payment_provider.py

@@ -452,7 +452,7 @@ class PaymentProvider(models.Model):
             'type': 'ir.actions.act_window',
             'name': _("Payment Methods"),
             'res_model': 'payment.method',
-            'view_mode': 'tree',
+            'view_mode': 'tree,kanban,form',
             'domain': [('id', 'in', self.with_context(active_test=False).payment_method_ids.ids)],
             'context': {'active_test': False},
         }