Added SeparateHoldingsByGroup system preference
Adds new tabs to Holdings table if preference is enabled
Separates by library groups
Test Plan:
1. Apply patch, restart_all, updatedatabase
2. Koha Administration -> System preferences -> SeparateHoldingsByGroup
3. Change to "Separate holdings by library group in subsequent tabs..." and Save
4. Koha Administration -> Library Groups
5. Create multiple library groups and check the 'Use for staff search groups' box.
6. Add your logged in library to each group and other libraries to each group.
7. Do catalog searches where the location of the item is a library in a library group
8. Notice tabs in the Holdings table for each library group if it contains a library that has the item
Signed-off-by: Lisette Scheer <lisette@bywatersolutions.com>
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
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