[BUGFIX] Set correct title and button text for create folder

Change-Id: I0e3d8e785811f6c743fa48c33527424e5a3f5f03
Resolves: #75750
Releases: master, 7.6
Reviewed-on: https://review.typo3.org/47755


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Richard Haeser <richardhaeser@gmail.com>
Tested-by: Richard Haeser <richardhaeser@gmail.com>
Reviewed-by: Frans Saris <franssaris@gmail.com>
Tested-by: Frans Saris <franssaris@gmail.com>