In order to fix select fields overflowing into each other
when they have very long option titles, the CSS rule
"overflow: hidden" has been added. As it seems, this wasn't
even necessary as the rule "min-width: 120px" already does
the trick.

The CSS rule "overflow: hidden" is now removed, which
enables the accessibility box-shadows from bootstrap 5
again.

Resolves: #97565
Related: #94688
Releases: main, 11.5
Change-Id: Ifd8495430ecdc404fa1dbebe9633ef5f401a6af6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/74530


Tested-by: core-ci <typo3@b13.com>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>