Times/Dates just render with a text field.

[robmoffat]

Would be better if there were individual fields for the time components.

[robmoffat]

Adaptive Card supports this: Input.Date

[robmoffat]

To do this, we could add a new function in Rendering:

	X dateField(Variable varialble, boolean editable);

and use this in TimeConverter.

The AdaptiveCardRendering can use Input.Date for editable date fields and text for display.