Bug 7369: Duplicate item and add dropdown buttons for item actions

Bug 7369: Duplicate item and add dropdown buttons for item actions

This patch adds a link to duplicate existing items on the edit items screen

To test:
1 - Apply patch
2 - navigate to the edit items screen for a record with existing items
3 - click the duplicate link and ensure item info but not barcode are carried over
4 - save the item and ensure it is added correctly
5 - check that all previous functionality on page works as before

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>