[BUGFIX] Respect link target for individual pages in menu generation

The link target configuration for a page was ignored during menu
generation. The link target is now respected and will override the
defined link target for the menu.

Resolves: #81162
Releases: master, 8.7
Change-Id: Iecf45456942c998e4084b95fe3003d2c5dc038db
Reviewed-on: https://review.typo3.org/52735


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Tested-by: Mona Muzaffar <mona.muzaffar@gmx.de>
Reviewed-by: Christer V <cvi@systime.dk>
Reviewed-by: Elmar Hinz <t3elmar@gmail.com>
Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>