Comment 8 for bug 1721109

Here's a new branch: user/sandbergja/lp1721109_update_item_status_after_holdings_changed

And here's a link to it: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/sandbergja/lp1721109_update_item_status_after_holdings_changed

In addition to showing newly updated data in the item status grid, this also adds:
* a toast message to let the user know that their changes have been saved, and
* a status column with a little icon that shows which rows have been modified.

Here are the testing notes from the commit message:

1) Go to Item Status List View, select an item, and go to Actions >
Edit > Items (or Call Numbers, or both).
2) Make a change to one of the columns you have active in
the Item Status list view. Click Save and Exit.
3) Note that the list view of Item Status has not updated.
4) Load this commit.
5) Repeat steps 1-2.
6) Note that the columns are updated this time. Note that
there is a new status column, and that an icon appears for
all the rows that you have changed. Also, note that there
is a toast message in the bottom right hand corner of the
screen confirming that you have successfully made your change.