* Add [`wagtailcache`](wagtailcache) and [`wagtailpagecache`](wagtailpagecache) template tags to ensure previewing Pages or Snippets will not be cached (Jake Howard)
### `ModelViewSet` automatically registers the model to the reference index
Models that are registered with a `ModelViewSet` now have reference index tracking enabled by default. This means that you no longer need to call `ReferenceIndex.register_model()` in your app's `ready()` method for such models. If this is undesired, you can disable it by setting {attr}`~wagtail.admin.viewsets.model.ModelViewSet.add_to_reference_index` to `False` on the `ModelViewSet` subclass. For more details, see [](managing_the_reference_index).