Comment 3 for bug 1707063

Here's a fix for the general problem causing this specific grid malfunction:

http://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/miker/lp-1707063-grid-last-mod-column

From the commit message:

Instead of comparing a (potentially undefined) property of a column, we'll just compare the column object directly when checking to see if a column header should be highlighted for "last touched in editing mode."