Add a  missing delete button within the Documentation module. Right now,
a user can't delete previously downloaded documentation.

Resolves: #80575
Releases: master, 8.7
Change-Id: I9077270c66ec225f1eb7a26e505da0d98d5f7f0e
Reviewed-on: https://review.typo3.org/54817


Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>