[BUGFIX] Restore same height for Tree and Docheader

Resolves: #95450
Releases: master
Change-Id: Ifc008b06c3db26a835d50fa7f07caa23600c9795
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71555


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Jochen <rothjochen@gmail.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Jochen <rothjochen@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>