[BUGFIX] File list module headline

View should guide users and always prompt the current status.
File list has been lacking a main headline - until now.

Change-Id: Id3d2d1963bbedf917d2e8bc8f7756c10a026512e
Resolves: #48380
Releases: 6.2
Reviewed-on: https://review.typo3.org/20906
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn