Change default settings for background color, invoice attachmentes and name scheme (#2288)

src/pretix/base/models/event.py

@@ -565,6 +565,8 @@ class Event(EventMixin, LoggedModel):
         self.settings.ticketoutput_pdf__enabled = True
         self.settings.ticketoutput_passbook__enabled = True
         self.settings.event_list_type = 'calendar'
+        self.settings.invoice_email_attachment = True
+        self.settings.name_scheme = 'given_family'
 
     @property
     def social_image(self):