Allow to send all invoices to a specific email address (#2072)

Co-authored-by: Martin Gross <gross@rami.io>

src/pretix/base/settings.py

@@ -854,6 +854,18 @@ DEFAULTS = {
                         "to emails."),
         )
     },
+    'invoice_email_organizer': {
+        'default': '',
+        'type': str,
+        'form_class': forms.EmailField,
+        'serializer_class': serializers.EmailField,
+        'form_kwargs': dict(
+            label=_("Email address to receive a copy of each invoice"),
+            help_text=_("Each newly created invoice will be sent to this email address shortly after creation. You can "
+                        "use this for an automated import of invoices to your accounting system. The invoice will be "
+                        "the only attachment of the email."),
+        )
+    },
     'show_items_outside_presale_period': {
         'default': 'True',
         'type': bool,