Fix #115 by using a custom object for dynamic fields

[CrystallDEV]

• Fix #115 by using a custom object for de-serializing and serializing the dynamic fields
• Fix differences between pipeline and webhook,
• Fix the array(s) cascading when saving multiple times

Testing done

• Ran several (20) builds with pipeline and UI to ensure everything (should be) / is working

• Submitter checklist

• [x] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!

• [x] Ensure that the pull request title represents the desired changelog entry

• [x] Please describe what you did

• [x] Link to relevant issues in GitHub or Jira

• [x] Link to relevant pull requests, esp. upstream and downstream changes

• [x] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[RecoX]

Thanks so much for this.