Fix dropdown content non appearing in MR view

What does this MR do?

Fixes the dropdown non being filled when clicked. Dropdown code was being called before there as a table in the DOM, therefore not working. Needs to be called when we receive the data and create the table in the DOM.

Screenshots (if relevant)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #25961 (closed)