StockItem Updates (#550)

* bump version

* Add new helpers for StockItem

* Navigate to sales order from stock item

* Navigate to customer (if specified)

* linting fix

lib/l10n/app_en.arb

@@ -1430,6 +1430,12 @@
   "translateHelp": "Help translate the InvenTree app",
   "@translateHelp": {},
 
+  "unavailable": "Unavailable",
+  "@unavailable": {},
+
+  "unavailableDetail": "Item is not available",
+  "@unavailableDetail": {},
+
   "unitPrice": "Unit Price",
   "@unitPrice": {},