[BUGFIX] Fix the display of references in filelist

Currently references are not displayed
in the filelist module when trying to delete a file
which has been referenced.

Fixes: #45538
Releases: 6.0, 6.1
Change-Id: Id88bc954ab0002585ec6bb75dabba901784ddab5
Reviewed-on: https://review.typo3.org/18333
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel