Sales order allocation (#464)

* New string

* Typo fix

* Add model for SalesOrderShipment

* Add placeholder button to sales order item

* Create a new shipment from the sales order detail view

* Fix API URL

* Add paginated shipment list

* Upate colors

* Add API form for allocation of stock to sales order

* Build out sales order line detail widge

* Use unallocated quantity

* Update release notes

* linting fix

lib/l10n/app_en.arb

@@ -47,6 +47,12 @@
   "appDetails": "App Details",
   "@appDetails": {},
 
+  "allocated": "Allocated",
+  "@allocated": {},
+
+  "allocateStock": "Allocate Stock",
+  "@allocateStock": {},
+
   "appReleaseNotes": "Display app release notes",
   "@appReleaseNotes": {},
 
@@ -1182,6 +1188,12 @@
   "serverNotSelected": "Server not selected",
   "@serverNotSelected": {},
 
+  "shipments": "Shipments",
+  "@shipments": {},
+
+  "shipmentAdd": "Add Shipment",
+  "@shipmentAdd": {},
+
   "shipped": "Shipped",
   "@shipped": {},