Empty "extension domain" in builder but domain is present in JSON view

[katewarner]

Describe the bug
When we upload BCOs from the GlyGen Server or view old BCOs, the "extension domain" page in builder is empty but it's present in the JSON or Tree view.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://biocomputeobject.org/builder?https://biocomputeobject.org/GLY_001158/DRAFT'
2. Click on 'Extension Domain' in the left-hand menu and it's empty
3. Click on 'Raw JSON view' in the left-hand menu
4. Scroll down to 'Extension Domain' and it contains Dataset categories information.

Expected behavior
The information in the "Extension Domain" of the BCO JSON, to be on the "Extension Domain" edit page on builder.

Screenshots
Empty "extension domain" in portal:

Present in JSON or Tree view:

Desktop (please complete the following information):

• OS: Windows
• Browser: Microsoft Edge
• Version: 130