LP1882825: Add setting for booking pull list grid

LP1882825: Add setting for booking pull list grid

Steps to test:
[1] Go to the Booking Pull List.
[2] Change the grid around and try to save.
[3] Note in your browser console an error message: "Error saving columns: No user or workstation setting type exists for eg.grid.booking.pull_list"
[4] Run the database migration included in this commit.
[5] Repeat steps 1-2.
[6] Note that no error message appears.
[7] Try exiting Evergreen and coming back (using the same workstation).  Note that your changes to the grid have stuck!

Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>
Signed-off-by: Chris Sharp <csharp@georgialibraries.org>