[TASK] Return to content element after un-/hide

Add the current content element as section to the un-/hide link.

Releases: master, 7.6
Resolves: #80274
Change-Id: I0d6ec4ea8274f82f6d4c66a4e9e77860819d4d15
Reviewed-on: https://review.typo3.org/52045


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>