During icon clean-up regrettably too many were removed.

This patch set reintroduces the missing revert icons.
Kudos to Mister Wouter.

Change-Id: Ice5fcdee292f968b16c55f8682e87d0dc63e6668
Resolves: #49594
Releases: 6.2
Reviewed-on: https://review.typo3.org/22020
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters