[PACKS] # 7 Show custom request units in banks' request view

[cielf]

Summary

Add custom request units to banks' request view .(assumes [PACKS] #3 is complete)

Why

This is step #7 of adding the ability to specify "packs" versus "individual" for requests

Details

If there are any items with customized units in the request, add a column for units. Do not show anything if no unit selected.

N.B.

All of the changes for PACKS must be implemented behind a flipper flag "enable_packs"

Criteria for completion

• [ ] functionality as described above
• [ ] tests that support the functionality as described above

Background

The following sections have been identified as required for the PACKS implementation. These should be implemented in numerical order.

REWORK -- either add changing Total Inventory to Total Inventory (all locations)