Reschedule date pickers no longer offer a date beyond your reschedule cap

If your store has a reschedule cap set, the server has always refused a subscriber's request to push their next order date beyond it. Until now, though, the date pickers themselves didn't know about that cap: a subscriber could pick a date past it and only find out it wasn't allowed after submitting.

Both the customer portal's next-order date picker and the reschedule picker in the Shopify customer account subscription page now grey out any date beyond the shop's cap, so a subscriber can't select one that would be refused in the first place.

If a subscriber has the page open when the cap changes, the picker on that already-loaded page stays unbounded until they refresh; the server's own refusal still applies in that case and is shown clearly if they try to save.