Wish: Pickers as InputView, instead of a new pushed view with single control

[timahrentlov]

I've been experimenting with creating data-entry form using dialogs. Many aspects are covered by the current version of Dialogs. And many thanks to Miquel for making our lives easier. But stuff like DatePickers on ipads does not seem that useful right now.

When choosing a DataTimeElement, it pushes an entire new view instead of using the InputView trick like this one seems to do: https://gist.github.com/965257