[BUGFIX] Followup to DateTimePicker exchange

The DateTimePicker exchange from ExtJS
to moment.js and twbs led to the problem
that when using FormEngine in a popup
the Date Format is not set due to the nature
of not having an iframe but a popup.

Releases: master
Resolves: #64076
Change-Id: I6c1bf2019d9ae2292f207fbd553a373c567b53a3
Reviewed-on: http://review.typo3.org/35703


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>