Date Range widget > The 2 calendars should be related

When chosing a first date in a date range widget, the suggested day in the second calendar should be the day following the first choice and the days before should be disabled.

For now the second calendar opens on the current day, no matter which date is selected in the first date range and I can select a day that is before the first date: it's only when I validate all the form that I have an unfriendly error feedback in 2 parts.

See screenshots.