Fixed copy action for "insert into column" icons

Change-Id: Ib669535fe98f25a02fb63872333f4c47494d3ea8
Resolves: #54827
Reviewed-on: https://review.typo3.org/28173
Reviewed-by: Philipp Gampe
Reviewed-by: Jo Hasenau
Tested-by: Jo Hasenau