more admin menus. I don't know other way to edit the columns that are visible...

more admin menus. I don't know other way to edit the columns that are visible except manually from psql

smash/web/admin.py

 from django.contrib import admin
 
 from models import StudySubject, Item, Room, AppointmentType, Language, Location, Worker, FlyingTeam, Availability, \
-    Holiday, Visit, Appointment
+    Holiday, Visit, Appointment, StudyColumns, StudySubjectList, StudyVisitList, VisitColumns, SubjectColumns
 
 
 class LanguageAdmin(admin.ModelAdmin):
@@ -21,3 +21,8 @@ admin.site.register(FlyingTeam)
 admin.site.register(Availability)
 admin.site.register(Holiday)
 admin.site.register(Appointment)
+admin.site.register(SubjectColumns)
+admin.site.register(StudyColumns)
+admin.site.register(StudySubjectList)
+admin.site.register(StudyVisitList)
+admin.site.register(VisitColumns)