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

This reverts commit f74d3d0e439520cd1a69f06abeef34830c5fd27f.

The D&D functionality for fieldsets is broken.

Change-Id: I68306d71c8efcd055482a1da6f95005dfea6cb0e
Reverts: #59305
Resolves: #63767
Releases: master, 6.2
Reviewed-on: http://review.typo3.org/35311
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>