Using a facet to filter search resets focus

When using a facet, a new search query is started and the new results are shown.
This moves the keyboard focus of the user back to the search input.

The focus shouldn't be forcibly moved without a very clear explanation and expectations from the user. In this use case, there is no good reason to move the focus.

The user expects to stay on the selected facet. It would be good to make sure they are notified with `aria-live` that a change happened on the results.