[BUGFIX] Use file name in delete confirmation message

Instead of using the file identifier, the actual file name
is used when asking if a file should be deleted.

This is important for non-local FAL storage drivers that
do not use paths as identifiers.

Change-Id: I34e42ed1716f08a4133e02bbc36ee805c6a108c7
Fixes: #58150
Releases: 6.2
Reviewed-on: https://review.typo3.org/29635
Reviewed-by: Frans Saris
Tested-by: Frans Saris
Reviewed-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Reviewed-by: Sebastian Fischer
Reviewed-by: Marcin Sągol
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers