Validation on Pms simulated Appointment

[brianpos]

Ensure that:
arrived status is only Booked, Arrived or Fulfilled,
the other fields are not blank

I'll also have to fix the DataTime formatting, something is making the whole app think its doing US formatting of the dates.

[grahamegrieve]

fixed: arrived status is only Booked, Arrived or Fulfilled + fix the DataTime formatting

not done: ensure the other fields are not blank