REQ: define business hours

[rockdevel]

It would be very helpful if you could set business hours in the calendar week view.
I certainly don't have any appointments in the time from 0-8, this area rather bothers me as I have to scroll down a bit to see all appointments for the day.

It would be nice to have a configuration option that defines in which time appointments can take place. As for example from 8-17 clock.