1.4.0 backwards. Fix leaking Ajax theme (state) on Views and dynamically loaded Pagers

[DiegoPino]

What?

This Fix here came too late https://git.drupalcode.org/project/drupal/-/blob/47280fc8f72fa8e6844a0ec8d4c17c90ad930dba/core/modules/views/src/Controller/ViewAjaxController.php and since everyone has been running newer drupals since the release our Ajax override Controller was not acting in sync with how this fix would handle that issue.

I will patch backwards 1.4.0 since 1.5.0 has dealt (for a year, sorry!) with this already.

[DiegoPino]

Resolved via 73d928a