Due Date on Checkout Doesn't Update After You've Changed Due Date

Steps to Repro:

1. Log into http://folio-q3.aws.indexdata.com (but any environment can work)
2. Check something out
3. On the checkout page, change the due date for a checked out item

Expected: After successful update, the due date displaying on the checkout page should update

Actual: I got a message that I successfully changed the due date but after closing the popup, the due date dislplaying on the page was unchanged. This is confusing.

Additional info: This may repro every time or it may have something to do with the fact that the Check out app is clearing due to inactivity all the time (argh - see UICHKOUT-70). I didn't have time to test out multiple scenarios.