Sales order support (#438)

* Add new models for SalesOrder

- Create generic Order and OrderLine models with common functionality

* Refactor

- Move some widgets around
- Cleanup directory structure

* Add link to home screen and nav drawer

* Add SalesOrder list widget

* Linting fixes

* Fix string

* Refactor PurchaseOrderDetailWidget

* Tweaks to existing code

* linting

* Fixes for drawer widget

* Add "detail" page for SalesOrder

* Add more tiles to SalesOrder detail

* Allow editing of salesorder

* add list filters for sales orders

* Display list of line items

* Customer updates

- Display customer icon on home screen
- Fetch sales orders for customer detail page

* Cleanup company detail view

* Create new sales order from list

* Stricter typing for formFields method

* Create new PurchaseOrder and SalesOrder from company deatil

* Status code updates

- Add function for name comparison
- Remove hard-coded values

* Update view permission checks for home widget

* Add ability to manually add SalesOrderLineItem

* Add nice progress bar widgets

* Display detail view for sales order line item

* edit SalesOrderLineItem

* Fix unused import

* Hide "shipped items" tab

- Will be added in a future update

lib/settings/home_settings.dart

@@ -21,6 +21,7 @@ class _HomeScreenSettingsState extends State<HomeScreenSettingsWidget> {
   // Home screen settings
   bool homeShowSubscribed = true;
   bool homeShowPo = true;
+  bool homeShowSo = true;
   bool homeShowSuppliers = true;
   bool homeShowManufacturers = true;
   bool homeShowCustomers = true;
@@ -38,6 +39,7 @@ class _HomeScreenSettingsState extends State<HomeScreenSettingsWidget> {
 
     homeShowSubscribed = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_SUBSCRIBED, true) as bool;
     homeShowPo = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_PO, true) as bool;
+    homeShowSo = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_SO, true) as bool;
     homeShowManufacturers = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_MANUFACTURERS, true) as bool;
     homeShowCustomers = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_CUSTOMERS, true) as bool;
     homeShowSuppliers = await InvenTreeSettingsManager().getValue(INV_HOME_SHOW_SUPPLIERS, true) as bool;
@@ -85,6 +87,20 @@ class _HomeScreenSettingsState extends State<HomeScreenSettingsWidget> {
                       },
                     ),
                   ),
+                  ListTile(
+                    title: Text(L10().homeShowSo),
+                    subtitle: Text(L10().homeShowSoDescription),
+                    leading: FaIcon(FontAwesomeIcons.truck),
+                    trailing: Switch(
+                      value: homeShowSo,
+                      onChanged: (bool value) {
+                        InvenTreeSettingsManager().setValue(INV_HOME_SHOW_SO, value);
+                        setState(() {
+                          homeShowSo = value;
+                        });
+                      },
+                    ),
+                  ),
                   ListTile(
                     title: Text(L10().homeShowSuppliers),
                     subtitle: Text(L10().homeShowSuppliersDescription),
@@ -116,6 +132,7 @@ class _HomeScreenSettingsState extends State<HomeScreenSettingsWidget> {
                       },
                     ),
                   ),
+                  */
                   ListTile(
                     title: Text(L10().homeShowCustomers),
                     subtitle: Text(L10().homeShowCustomersDescription),
@@ -130,7 +147,6 @@ class _HomeScreenSettingsState extends State<HomeScreenSettingsWidget> {
                       },
                     ),
                   ),
-                   */
                 ]
             )
         )