ADD: dav_events: add support for confirm payments.

dav_events/django_project_config/settings-dav_events.py

@@ -16,6 +16,7 @@ GROUPS_MANAGER_B = ['Bereichsleiter_Bergsteigen']
 GROUPS_PUBLISHER_PRINT = ['Redaktion_KA-Alpin']
 GROUPS_PUBLISHER_WEB = ['Redaktion_Joomla']
 GROUPS_PUBLISHER_FACEBOOK = ['Redaktion_Facebook']
+GROUPS_OFFICE = ['Geschaeftsstelle']
 
 # ChainedForm and sub classes
 FORM_INITIALS = {