[TASK] Use new modal for not found page when using &edit as parameter

When using &edit=123124312321 as extra parameter for the backend
an oldschool alert is shown.
Replace this with a nicer modal.

Resolves: #78533
Releases: master
Change-Id: I83d3c7bd358a0eced599a31ec51af6186089d723
Reviewed-on: https://review.typo3.org/50477


Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>