[TASK] Missing visual representation of sys_file_reference

File references are currently only represented by the accordant
record uid which should at least be a filename. In a workspace
environment the changed file references shall be visualized
as thumbnails - either being removed or inserted.

Resolves: #60011
Releases: master
Change-Id: I6d22619c264ff0e5411a47b2d566ec2c9b7c2607
Reviewed-on: https://review.typo3.org/31270


Reviewed-by: Alexander Opitz <opitz.alexander@googlemail.com>
Tested-by: Alexander Opitz <opitz.alexander@googlemail.com>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>