[TASK] Show warning when deleting an element which has references

Show the same warning in the page module as done in the list module,
except without the title and the table:uid combination, as this is
not needed in page module. It will always be tt_content records there.

Resolves: #78912
Releases: master
Change-Id: I4dea94204475e322fabf30d7a0772dc5e30edb60
Reviewed-on: https://review.typo3.org/50895


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Steffen Frese <steffenf14@gmail.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>