[BUGFIX] Reduce height of dragged container

this patch reduces the height of a dragged container
and also reduces the height of a possible
drop container. So a large element can be dragged
and dropped to another position

Resolves: #61824
Releases: master
Change-Id: Ief37a898fe589420e5c8b42d1127b9a341916471
Reviewed-on: http://review.typo3.org/41690


Reviewed-by: Thomas Löffler <loeffler@spooner-web.de>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>