Add onCalendarChange to CWMSForm

[krowvin]

I am creating a report page that allows users to select previous and future timestamps with the calendar dropdown. When they select a day in the past all the values (that I have queried myself), including the form values, should update to that timestamp.

Need to be able to re-query other datapoints in my page when the calendar changes using that timestamp the calendar provides.

One approach might be to expose a

onCalendarChange that provides an object with the calendar's timestamp that can be used as a query key or query param for CDA calls.

Alternatives

Could possibly yank the timestamp out of the context like this?

const { baseTimestamp } = useContext(FormContext);

But might not be obvious as an option for other users that wish to handle this onChange event.