[BUGFIX] Show duplicate button only if it makes sense

Resolves: #83892
Related: #77685
Releases: master
Change-Id: I16a7d57efa7d75e712bba24724d4da365b0aa40a
Reviewed-on: https://review.typo3.org/55713


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>