[FEATURE] Double click in structure tree changes label

A new convenience function has been integrated which allows the user to
change the label of an element within the structure tree.

Releases: master
Resolves: #84757
Change-Id: I7095dfbec8731714ceb2a73bb62b58aaa3cb8957
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/60582


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Ralf Zimmermann <ralf.zimmermann@tritum.de>