The AjaxLoginHandler which does AJAX logic for login timeouts is be moved
to the proper location, as it is a controller.

A class alias is in place.

Resolves: #82805
Releases: master
Change-Id: I6a9fed6236d6d82150dec2ac7c2ce61bd194b8ec
Reviewed-on: https://review.typo3.org/54441


Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>