old_contents: from django.contrib import admin
  from .models import Webhook
  
  admin.site.register(Webhook)
  
new_contents: from django.contrib import admin
  from .models import Webhook
  
  class WebhookAdmin(admin.ModelAdmin):
      list_display = ('__unicode__', 'event', 'url')
      list_editable = ('event', 'url')
      list_filter = ('event',)
  
  admin.site.register(Webhook, WebhookAdmin)
  
subject: Add custom ModelAdmin for easier editing from list view