[BUGFIX] Resolve recursing DOM manipulation

To fix the recursive DOM manipulation, the selector class name used to
find the "blueprint" is removed from the actual clone.

Resolves: #84832
Related: #84772
Releases: master
Change-Id: Id1a26ca9d20d95c8395998c6783715e677f16780
Reviewed-on: https://review.typo3.org/56772


Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Philipp Hamid <ph@supertrumpf.at>
Tested-by: Philipp Hamid <ph@supertrumpf.at>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>