Multiple trigger variables show in separate line

What does this MR do?

Separate lines for multiple trigger variables

Screenshot

What are the relevant issue numbers?

Closes #19006 (closed)

Does this MR meet the acceptance criteria?

• CHANGELOG entry added
• Tests
  • Add tests for multiple trigger variables view
  • All builds are passing
• Branch has no merge conflicts with master (if you do - rebase it please)

cc @ubudzisz @grzesiek @yorickpeterse @tmaczukin @chastell @tomash