#287 Record changes in item barcode numbers

[Terry O'Neill]

Currently when item barcode numbers are changed (via "Perform DR Tasks" -> "Change Item Numbers") DPR simply updates the item barcodes in that facility so that it is as if the item barcodes changed to were always that way. It really should record the details of this change instead. This should also include such details as who made the change and when they made it.