Revert "[TASK] Increase touch area for collapsible panel headings"

This reverts commit abd887a1.

Reason for revert: Multiple places are broken now. See comment from Nikita in the original patch.

Change-Id: Ib9970eb0b5b449899adc2b5b082283948349a1f5
Reverts: #99580
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77433


Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>