[FEATURE] Activated D&D copy by pressing the CTRL key while dropping

Resolves: #74179
Releases: master
Change-Id: I93864236f179b57cc0b1cbf67ce9941da096986a
Reviewed-on: https://review.typo3.org/47062


Reviewed-by: Jan Helke <typo3@helke.de>
Tested-by: Jan Helke <typo3@helke.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Tested-by: Bjoern Jacob <bjoern.jacob@tritum.de>
Reviewed-by: Benni Mack <benni@typo3.org>