Add fixed time option to DatePicker field configuration
In a form which creates a database record the user can set a publishing date which is mapped to the starttime field in the data base. But the user can only pick a date.
Currently the TYPO3\CMS\Form\ViewHelpers\Form\DatePickerViewHelper sets the current time if no time selector was provided.
It would be nice to have a fixedTime option in the DatePicker filed configuration (e.g. in the format H:i:s) which is used if the time selector isn't active.