[TASK] Fluidification of UserToolbarItem

Resolves: #78451
Releases: master
Change-Id: If4d40e41abc604b430168293446ab5dfd579ca3e
Reviewed-on: https://review.typo3.org/50393


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Gianluigi Martino <gmartino27@gmail.com>
Tested-by: Gianluigi Martino <gmartino27@gmail.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>