[BUGFIX] Show labels of additional doktypes in new page drag area

Get the labels for the doktypes from TCA

Resolves: #52955
Releases: 6.2, 6.1
Change-Id: I6d70c11f1711bf191a4ce14a91796819224649da
Reviewed-on: https://review.typo3.org/24934
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters