Comment 18 for bug 1846552

Here's a branch:

https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/berick/lp1846552-copy-loc-order-ui

I decided to forgo the drag-and-drop approach, opting instead to use up/down/top/bottom arrows, similar to the grid column manager.