[BUGFIX] Add missing htmlspecialchars() and cleanup in EXT:recordlist

Add missing htmlspecialchars() calls in EXT:recordlist and do cleanup.

Resolves: #83358
Releases: master, 8.7
Change-Id: If441da15bd0b37ca94121b3787457dddde9380bf
Reviewed-on: https://review.typo3.org/55117


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>