Comment 1 for bug 2021755

I believe all we need here is the multisort option on the grid. Branch here: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/sleary/lp2021755-staff-portal-grid-sort-priority

Someone please correct me if local sorting is not the appropriate method here!

To test:

1. Visit /staff/admin/local/config/ui_staff_portal_page_entry
2. In the grid settings dropdown, choose "Manage Columns"
3. Verify that you can see the sort priority inputs
4. Change the sort priority of a column and verify that it sorts as you expect
5. Save the grid settings, refresh the page, and verify that your sort priority is still set