[BUGFIX] Add missing htmlspecialchars() calls and cleanup in QueryView

Add missing htmlspecialchars() calls in
EXT:core/Classes/Database/QueryView.php and do cleanup.

Resolves: #83354
Releases: master, 8.7
Change-Id: I71c463e1a2912aa20535c7a1bbc0c690560f7e63
Reviewed-on: https://review.typo3.org/55111


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Tobi Kretschmann <tobi@tobishome.de>
Tested-by: Tobi Kretschmann <tobi@tobishome.de>
Reviewed-by: Sascha Rademacher <sascha.rademacher+typo3@gmail.com>
Tested-by: Sascha Rademacher <sascha.rademacher+typo3@gmail.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>