Bug 8585 : Add System Preference to specify Holds to Pull List Start Date

Bug 8585 : Add System Preference to specify Holds to Pull List Start Date

Currently, Koha creates a default value of 2 days ago (-2) for the start date of the Holds to pull List. This system preference allows users to specify their own default start date for this list, since users might not want to have to manually change the date all the time when they already know the set date period they want to view.

The system preference value is specified as a positive integer, which is then passed as a negative integer in the handler script. This saves users from having to include a qualifer to the sys pref value.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>