Add a currency field to the "Pay" screen of the "Job" tab

Please add an additional "Currency" field to the "Pay" screen of the "Job" tab. This will need to be a drop-down list which shows the ISO 4217 currency codes. Please make it possible to jump to the code by typing the letters as well as being able to use the mouse to select from the list. The value should default to the last one chosen.

The field should be positioned below "Pay grade" and above "Pay rate"