Exposed for inputs lose focus when autosubmitting

Hi @pixelwhip, thanks for your contribution. Can we move the issue to "Needs Review" or is it still in progress?

I refactored this change to move all the internal methods inside the Drupal behavior so other modules and themes might more easily tap into it. I needed this as my exposed form contained some custom multi-select listboxes that are not handled by change alone and are outside the scope of this module.

I implemented an alternative solution which makes use of the new refocus-blur AJAX setting → to refocus the last active element.