Add Multi-Selector Functionality to PPR / PPRT for "Supplier Type"

Summary

Add the ability to record multiple supplier types when commencing a PPR.

Content

Currently the Supplier Type field can be populated with a Single Value, or left null. In many cases, selecting a single type of supplier is absolutely fine and acceptable. However, the ability to define selection criteria based upon the supplier type will help users filter the selection of payments further increasing usability and options for more granular rules. 

In the event a customer is using Supplier Type for selection, they must either 1) Select all invoices and filter the results. or 2) perform multiple PPR incurring additional admin and effort.