Compatibility with viewsreference

Problem/Motivation

Using the Views Reference Field module → , it is possible to reference views through blocks inside of the layout builder. When a section with such a block is saved in the library and then applied, the block configuration is incomplete causing the page to break.

Steps to reproduce

1. Install drupal/viewsreference
2. Configure a content block with a views reference field
3. Edit a node override layout and add the block inside of a section
4. Save it in the library and re-apply it on another page

Proposed resolution

Implement a method in DeepCloningTrait to properly clone views reference entities.