Add 'Calendar Days' option for 'Minimum Advance Notice' field for Room Bookings
Currently, the 'Minimum Advance Notice' field in the room management options for room bookings can only be set in hours. This requires clumsy calculations to make bookings functionally require a desired notice time, such as 1 week, and is oddly limited compared to the options present in the 'Maximum Window' fields.
This field should match the 'Maximum Window' field and allow the window for Minimum Advance notice to be set in Calendar Days.