The working times for each day type can be changed by clicking the
Working Time
button, which will launch the working time dialog.
The working time dialog shows a list of the available day types on the left,
and the working hours for the currently selected type on the right.  Time is
entered in 24 hour format as am/pm indicators are not supported (i.e. 5:00 PM
would be entered as 17:00).
Day types can be added by choosing
ProjectEdit Day Types
This dialog displays a simple list of day types.  Use the
Add and Remove buttons
to manage the list.  Note that you cannot remove the default day types
"Working" and "Nonworking".
