Don't re-fill all available recommended settings to task type form

[philippotto]

If there is already a non-null recommendation-configuration, don't add the defaults.

URL of deployed dev instance (used for testing):

• https://___.webknossos.xyz

Steps to test:

• edit the default task type and add a recommended configuration
• use the "remove" buttons to edit the recommended configuration
• save task type and re-open the edit page
• the recommended configuration should look exactly as before (i.e., no additional attributes should be added)
• disabling the recommendation, saving + reloading, re-enabling the recommendation should show all available properties again

Issues:

• fixes Task Type form re-fills all available recommended settings #5270

---

• Updated (unreleased) changelog
• Updated (unreleased) migration guide if applicable
• Updated documentation if applicable
• Adapted wk-connect if datastore API changes
• Needs datastore update after deployment
• Ready for review

[philippotto]

@MichaelBuessemeyer ping :)

[MichaelBuessemeyer]

LGTM and works as described 👍

There is just one small thing flow is complaining about. I left a suggestion that is hopefully "pretty" :)

And thanks for the detailed testing steps. They made pretty easy to check.