Add BasePaymentProvider.payment_control_render_short and use it on refund page

src/pretix/plugins/banktransfer/payment.py

@@ -282,6 +282,19 @@ class BankTransfer(BasePaymentProvider):
     def payment_partial_refund_supported(self, payment: OrderPayment) -> bool:
         return self.payment_refund_supported(payment)
 
+    def payment_control_render_short(self, payment: OrderPayment) -> str:
+        pi = payment.info_data or {}
+        r = pi.get('payer', '')
+        if pi.get('iban'):
+            if r:
+                r += ' / '
+            r += pi.get('iban')
+        if pi.get('bic'):
+            if r:
+                r += ' / '
+            r += pi.get('bic')
+        return r
+
     def payment_presale_render(self, payment: OrderPayment) -> str:
         pi = payment.info_data or {}
         if self.payment_refund_supported(payment):

src/pretix/plugins/paypal/payment.py

@@ -477,6 +477,9 @@ class Paypal(BasePaymentProvider):
                'payment_info': payment.info_data, 'order': payment.order, 'sale_id': sale_id}
         return template.render(ctx)
 
+    def payment_control_render_short(self, payment: OrderPayment) -> str:
+        return payment.info_data.get('payer', {}).get('payer_info', {}).get('email', '')
+
     def payment_partial_refund_supported(self, payment: OrderPayment):
         # Paypal refunds are possible for 180 days after purchase:
         # https://www.paypal.com/lc/smarthelp/article/how-do-i-issue-a-refund-faq780#:~:text=Refund%20after%20180%20days%20of,PayPal%20balance%20of%20the%20recipient.