Implement Custom Fields for Purchase Orders

Current situation or problem:
The order and order lines record has accumulated a number of data points that are core to the creation and processing of orders in FOLIO. However, institutions are limited to these data points in managing reporting and supporting their unique workflows.

In scope
Add "Custom fields" functionality to POL record
Add support for searching and/or filtering by these custom fields in the Orders UI
Add ability to expose custom fields in Receiving UI

Out of scope
TBD

Use case(s)
See wiki: https://wiki.folio.org/display/DD/Orders+-+Custom+fields

Proposed solution/stories
See wiki https://wiki.folio.org/display/DD/Orders+-+Custom+fields

Links to additional info
https://wiki.folio.org/pages/viewpage.action?spaceKey=FOLIJET&title=MODCFIELDS-39+-+Custom+Field+backend+demo

Questions