[BUGFIX] Fix title for expand button in workspace module

Change-Id: I6a17811dd5dbc5ed285b6040fcbe97e94b416b8b
Releases: master
Resolves: #79321
Reviewed-on: https://review.typo3.org/51359


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>