Display warning when POL is Fully paid

Purpose: When creating an invoice it is not always clear that the purchase order you are trying to pay is not already fully paid. This will make sure it is clear to the user that they are working with a POL that is paid.

User story statement(s):

As a librarian creating an invoice,
I want to know if the order I connected is fully paid
so that I don't pay for things twice

Scenarios:

1. Scenario:
   • Given User adds invoice line based on POL that has payment status = Fully Paid
   • When line is added to view pane
   • Then Warning banner appears in record header
   • AND warning icon shows on relevant invoice line