[BUGFIX] dbFileIcons: Show UID for internal_type db

The UID value for show_thumbs needs to be shown for internal_type db,
and not for internal_type file,folder, ...

Change-Id: Iea97d5b03ece19562e9834147f1ce601f2e9e039
Resolves: #66044
Releases: master
Reviewed-on: http://review.typo3.org/38239


Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>
Reviewed-by: Andreas Fernandez <andreas.fernandez@aspedia.de>
Tested-by: Andreas Fernandez <andreas.fernandez@aspedia.de>