Add moderation for mailing lists

sith/settings.py

@@ -543,6 +543,7 @@ SITH_LAUNDERETTE_PRICES = {
 }
 
 SITH_NOTIFICATIONS = [
+    ('MAILING_MODERATION', _("A new mailing list neet to be moderated")),
     ('NEWS_MODERATION', _("A fresh new to be moderated")),
     ('FILE_MODERATION', _("New files to be moderated")),
     ('SAS_MODERATION', _("New pictures/album to be moderated in the SAS")),