Use trigger(:click) instead of trigger to avoid a weird transient bug

Closed username-removed-128633 requested to merge 2843-fix-transient-failure into master

What does this MR do?

I don't get why we get this transient failure, but I think using trigger(:click) is ok given the screenshot that clearly shows that there is no overlapping element on the dropdown (see the issue)...

What are the relevant issue numbers?

Closes #2843 (closed)