Automatically change shift status to "Booked" upon staff confirmation

You are able to book staff onto shifts with various statuses as shown:

The 'booked' status is the only status that confirms this shift as booked. All others are provisional statuses that still show this shift as available on the Job Market and throughout the system.

By enabling this option when you book staff to a shift with any other status apart from booked, and they confirm their shifts via the link in the email or via their staffarea then the shifts will automatically change to a status of booked.

This is useful if a staff member isn't to sure whether or not they can do a shift so you leave the shift as 'provisional' for example and then leave it for the staff to confirm and book themselves once they are sure they can do the shifts.

You can still easily monitor this as the shift will still be seen as not booked throughout the system should they not confirm. There are 3 shifts below for May 1 at a location, and all 3 have staff allocated, but Alice is set to Provisional and so it shows only 2 out of the 3 shifts as filled.