[BUGFIX] Remove visual gap from hidden CEs on page module

Hidden content elements are still present in the document flow
but just have a height of 0 causing the uniform spacing with
collapsed margins to fail. We remove the hidden element from
the document flow to prevent this.

Resolves: #100370
Releases: main
Change-Id: Ia7616b1d95206fb67441e36f15a866c01ba28b1c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/78352


Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Torben Hansen <derhansen@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Torben Hansen <derhansen@gmail.com>