[BUGFIX] Avoid warning dialog when closing records with dateTime fields

In case a record contains a DateTimePicker field, the validation is triggered to early
and mark each DateTime field as changed. This patch fix this wrong behavior.

Resolves: #80008
Releases: master
Change-Id: I9a2d81c6cf5b544d5a6f08f43fd2fea86b415d6a
Reviewed-on: https://review.typo3.org/52140


Tested-by: TYPO3com <no-reply@typo3.com>
Tested-by: Joerg Kummer <service@enobe.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>