Sales order barcode allocate (#6072)

* Bug fix for BarcodePOReceive endpoint

- Existing scan must match "stockitem" to raise an error

* bug fix: barcode.js

- Handle new return data from barcode scan endpoint

* Add barcode endpoint for allocating stock to sales order

* Improve logic for preventing over allocation of stock item to sales order

* Test for sufficient quantity

* Bump API version

* Bug fix and extra check

* Cleanup unit tests

* Add unit testing for new endpoint

* Add blank page for app sales orders docs

* Add docs for new barcode features in app

* Fix unit tests

* Remove debug statement

docs/docs/app/so.md

@@ -0,0 +1,37 @@
+---
+title: Sales Orders
+---
+
+## Sales Order List
+
+The sales order list display shows all sales orders:
+
+{% with id="so_list", url="app/so_list.png", maxheight="240px", description="Sales order list" %}
+{% include "img.html" %}
+{% endwith %}
+
+Select an individual sales order to display the detail view for that order.
+
+### Filtering
+
+Displayed sales orders can be subsequently filtered using the search input at the top of the screen
+
+## Sales Order Detail
+
+Select an individual order to show the detailed view for that order:
+
+{% with id="so_detail", url="app/so_detail.png", maxheight="240px", description="Sales order details" %}
+{% include "img.html" %}
+{% endwith %}
+
+### Edit Order Details
+
+From the detail view, select the *Edit* button in the top-right of the screen. This opens the sales order editing display.
+
+### Line Items
+
+View the line items associated with the selected order:
+
+{% with id="so_lines", url="app/so_lines.png", maxheight="240px", description="Sales order lines" %}
+{% include "img.html" %}
+{% endwith %}