Bug 36547: Added checked out column to Overdue table

Bug 36547: Added checked out column to Overdue table

To test:
1. Make sure you have some overdue checkouts in your installation.
2. Go to Circulation > Overdues
3. Verify the ‘Checked out on’ column is visible by default, but can be hidden using the column settings
4. Verify that the export to CSV via the link on top of the table and includes the ‘Checked out on’ field.
5. Sign off and have an incredible day :D

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>