Merge branch 'feature/422-mailinglist-search' into 'master'

Add alias searching to mailinglists and show them in the admin overview

Closes #422

See merge request !485

website/mailinglists/admin.py

 from django.contrib import admin
+from django.utils.translation import ugettext_lazy as _
 from members.models import Member
 
 from .models import ListAlias, MailingList, VerbatimAddress
@@ -13,7 +14,13 @@ class ListAliasInline(admin.TabularInline):
 
 
 @admin.register(MailingList)
-class GeneralMeetingAdmin(admin.ModelAdmin):
+class MailingListAdmin(admin.ModelAdmin):
     model = Member
     filter_horizontal = ('members',)
     inlines = (VerbatimAddressInline, ListAliasInline)
+    list_display = ('name', 'alias_names',)
+    search_fields = ['name', 'prefix', 'aliasses__alias']
+
+    def alias_names(self, obj):
+        return [x.alias for x in obj.aliasses.all()]
+    alias_names.short_description = _('List aliasses')