Release 15th August 2021 - Vendor Booking TTI Phase 1.5

Summary:
Booking Form - Balance Quantities on Select Orders / Confirm Quantities

Ticket: https://bigdigit.atlassian.net/browse/DCM-1664

Detail:
PO Line quantities need to be updated more often and in multiple places so the quantities are kept up to date which will help the Vendor when planning/adding lines to Bookings

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