Show next scheduled contribution date for recurring contributions on contact

Currently, the active recurring contribution start date is shown, but the next scheduled contribution date would be much more useful (I often find myself looking for the next contribution date, especially when there is a credit card issue, but rarely need to know the start date for the series).

For inactive recurring contributions, it would be much more useful to know the cancellation date than the start date.

For reference, the current situation:

Will submit PR if supported.