[BI-2878] Germplasm External UID missing from UI

[davedrp]

Description

BI-2878 Germplasm External UID missing from UI

Dependencies

bi-web: feature/BI-2878

Testing

1. Import Germplasm with both a Seed Source and a External UID
2. Go to Germplasm page (list of all Germplasm).
   Expected Result:

• The External UID should be displayed for the newly imported Germplasm.

3. Press the Lists tab.
4. Press the Details link for the newly imported Germplasm List.
   Expected Result:

• The External UID should be displayed for the newly imported Germplasm.

Checklist:

• I have performed a self-review of my own code
• I have tested my code and ensured it meets the acceptance criteria of the story
• I have create/modified unit and/or integration tests to cover this change or tests are not applicable
• I have commented my code, particularly in hard-to-understand areas
• I have either updated the source of truth or arranged for update with product owner if needed https://breedinginsight.atlassian.net/wiki/spaces/BI/pages/1559953409/Source+of+Truth