Not allowed to book in past

[wiggydave10]

1) Go to "Schedule"

2) Select yesterday

3) Click on a empty slot

See: Taken to booking page, and see error "The start time is in the past" upon trying to save with no possibility to change date.

Expect: Would be nice to either be able to change date on booking form, or not be able to book on previous/past dates. Seems a bit confusing from user perspective.

[Gavin Sharp]

Changed. Unable to datepick a past date

[wiggydave10]

Tested and works.