[TASK] Unify layout of SelectCheckBox group headers

Before it was not really clear if/where a select check box header
was collapsible. This patch unifies the layout with the one of the
recordlist tables, adding a button specifically responsible to
collapse/expand the group.

Resolves: #98683
Releases: main, 12.4
Change-Id: I6b47cdc9cd2673a85aaa0bfb85dd70534e4ffc33
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79703


Tested-by: Michael Telgkamp <michael.telgkamp@mindscreen.de>
Tested-by: Andreas Nedbal <andy@pixelde.su>
Reviewed-by: Andreas Nedbal <andy@pixelde.su>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Michael Telgkamp <michael.telgkamp@mindscreen.de>