Order picture action (#557)

* Add "take picture" to purchase order detail

* Rename uploaded images

* Provide prefix when uploading images

* Add similar functionality for "sales order" detail

* Add new settings screens

* Control camera shortcut

* Bump release notes

lib/widget/stock/stock_detail.dart

@@ -844,6 +844,7 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
                 builder: (context) => AttachmentWidget(
                   InvenTreeStockItemAttachment(),
                   widget.item.pk,
+                  L10().stockItem,
                   widget.item.canEdit,
                 )
               )