Comment 3 for bug 1811466

Working branch available at:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/mmorgan/lp1811466_add_fields_to_holdings_editor_grids

Adds the creator username, editor username and last edit date to both working and completed column pickers in the holdings editor. Screenshots to follow.