A new close button is rendered next to the "Open Documents" headline in
the dropdown menu which enables to close all open documents at once.

Resolves: #89053
Releases: master
Change-Id: I4a1a7503cd0140210f4f78148f9dec1312d67dda
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63836


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Haupt <mail@danielhaupt.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Haupt <mail@danielhaupt.de>
Reviewed-by: Benni Mack <benni@typo3.org>