A booking saved with 18:00 to 09:00 and no end date was stored as ending
earlier on its start day without a word. The dialog now says that the end
time lies before the start time and that an end date is needed if it ends
the next day, on desktop and on the phone. It only warns and does not block
the save, since time zones can make such times correct.
Refs #2604
The booking dialog and the phone booking sheet keep their markup and run on useReservationForm: how a saved booking or an import fills the form, the end before start check, the start date and time, the place and hotel picks, the stay range and the request body with the stay a hotel booking creates come from reservationFormModel. The desktop's check-in window, its link to a stop inside the form and its imported price stay its own, behind options where the code is shared.
Maurice