[BUGFIX] Permissions backend module not accessible

Permissions backend module not accessible in "List" view.

Change-Id: Ic1e4e06f387ee5450466e051162572c3392e3d53
Resolves: #49918
Releases: 6.2, 6.1, 6.0
Reviewed-on: https://review.typo3.org/22226
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind