[TASK] Align user dropdown with all others

Provide a title in the backend as well for the user dropdown
Furthermore an empty module section is prevented.

Resolves: #78475
Releases: master
Change-Id: Ie1fd96c345a9bde2c2bc3c7f3248cf56e40729a7
Reviewed-on: https://review.typo3.org/50407


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Tested-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>