Revert "[BUGFIX] Fix broken form wizard with MSIE"

This reverts commit 0f1a9aa3c9dd7d710ecd8bf9a57d51a304bc2337.

The D&D functionality for fieldsets is broken.

Change-Id: I79c5e92dd8d80a1af1b665fb3df522f5503006bf
Reverts: #59305
Resolves: #63767
Releases: master, 6.2
Reviewed-on: http://review.typo3.org/35312
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>