Fix funders show country

[ptamarit]

:heart: Thank you for your contribution!

Description

• Fixes #342

:walking: Review path

• The 1st commit includes the country_name in the API response for funders which have a country_name (recently updated ones)
• The pull request inveniosoftware/invenio-app-rdm#2704 modifies deserializeFunder to pass include country_name in the deserialized form of funder items.
• The 2nd commit simplifies the logic of deserializeFunderToDropdown by using optional chaining
• The 3rd commit modifies deserializeFunderToDropdown to shows the country code for existing funders which don't have yet a country_name
• Note that the modified deserializeFunder function is used lower down in the render function of CustomAwardForm.

:shrug: Open questions

Places which might need to be modified to also include country_name:

• [ ] FundingField's deserializeFunder
• [ ] FundersLabels's fields
• [ ] FundersLabels's _vocab_to_label

Checklist

Ticks in all boxes and 🟢 on all GitHub actions status checks are required to merge:

• [x] I'm aware of the code of conduct.
• [x] I've created logical separate commits and followed the commit message format.
• [x] I've added relevant test cases.
• [x] I've added relevant documentation.
• [x] I've marked translation strings.
• [x] I've identified the copyright holder(s) and updated copyright headers for touched files (>15 lines contributions).
• [x] I've NOT included third-party code (copy/pasted source code or new dependencies).
  • If you have added third-party code (copy/pasted or new dependencies), please reach out to an architect.

Frontend

• [x] I've followed the CSS/JS and React guidelines.
• [x] I've followed the web accessibility guidelines.
• [x] I've followed the user interface guidelines.

Reminder

By using GitHub, you have already agreed to the GitHub’s Terms of Service including that:

1. You license your contribution under the same terms as the current repository’s license.
2. You agree that you have the right to license your contribution under the current repository’s license.