### What?
Respects the defaultDepth setting in the admin UI API view.
### Why?
The current default is hardcoded to `1` with no configuration option.
This can lead to performance issues on documents with a lot of related
large documents. Having the ability to define a different default can
prevent this issue.
### How?
Set the depth in the API view to `config.defaultDepth` as default.
Co-authored-by: Jacob Fletcher <jacobsfletch@gmail.com>