SalesOrderShipment (#697)

* Add detail widget for SalesOrderShipment

* Support editing of shipment details

* Rearrange SalesOrderDetail page

* Add support for attachments against shipment model

* refactoring

* Add shipment details page

* Add user actions for shipments:

- Check / uncheck
- Take photo

* Placeholder action to send shipment

* Send shipment from app

* Display pending shipments on the home screen

* Improve rending for shipments list

* Add class definition for SalesOrderAllocation

* Display list of items allocated against SalesOrderShipment

* Bump release notse

* Click through to stock item

* Bump version number

* dart format

* cleanup

* Remove unused imports

lib/widget/attachment_widget.dart

@@ -3,7 +3,6 @@ import "dart:io";
 import "package:flutter/material.dart";
 import "package:flutter_tabler_icons/flutter_tabler_icons.dart";
 import "package:one_context/one_context.dart";
-import "package:url_launcher/url_launcher.dart";
 
 import "package:inventree/api.dart";
 import "package:inventree/l10.dart";
@@ -212,17 +211,14 @@ class _AttachmentWidgetState extends RefreshableState<AttachmentWidget> {
             },
           ),
         );
-      } else if (attachment.link.isNotEmpty) {
+      } else if (attachment.hasLink) {
         tiles.add(
           ListTile(
             title: Text(attachment.link),
             subtitle: Text(attachment.comment),
             leading: Icon(TablerIcons.link, color: COLOR_ACTION),
             onTap: () async {
-              var uri = Uri.tryParse(attachment.link.trimLeft());
-              if (uri != null && await canLaunchUrl(uri)) {
-                await launchUrl(uri);
-              }
+              attachment.openLink();
             },
             onLongPress: () {
               showOptionsMenu(context, attachment);