[BUGFIX] Increase z-index of flatpickr
If may happen that the flatpickr is rendered behind a checkbox of
nullable values in FormEngine due to conflicts in z-index. This patch
increases the z-index of flatpickr.
Resolves: #92912
Releases: master
Change-Id: I632b424e6d00c48b5aef48ec1a15fdb7149f509a
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66932
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: okmiim <okmiim@live.de>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: okmiim <okmiim@live.de>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>