display model pk entries (#851)

lib/widget/order/extra_line_detail.dart

@@ -68,6 +68,10 @@ class _ExtraLineDetailWidgetState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     tiles.add(
       ListTile(
         title: Text(L10().reference),

lib/widget/order/po_line_detail.dart

@@ -139,6 +139,10 @@ class _POLineDetailWidgetState extends RefreshableState<POLineDetailWidget> {
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Reference to the part
     tiles.add(
       ListTile(

lib/widget/order/purchase_order_detail.dart

@@ -404,6 +404,10 @@ class _PurchaseOrderDetailState
 
     tiles.add(headerTile(context));
 
+    if (showPk) {
+      tiles.add(pkTile(widget.order.pk));
+    }
+
     if (supportProjectCodes && widget.order.hasProjectCode) {
       tiles.add(
         ListTile(

lib/widget/order/sales_order_detail.dart

@@ -344,6 +344,10 @@ class _SalesOrderDetailState extends RefreshableState<SalesOrderDetailWidget> {
   List<Widget> orderTiles(BuildContext context) {
     List<Widget> tiles = [headerTile(context)];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.order.pk));
+    }
+
     InvenTreeCompany? customer = widget.order.customer;
 
     if (supportsProjectCodes && widget.order.hasProjectCode) {

lib/widget/order/so_line_detail.dart

@@ -165,6 +165,10 @@ class _SOLineDetailWidgetState extends RefreshableState<SoLineDetailWidget> {
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.item.pk));
+    }
+
     // Reference to the part
     tiles.add(
       ListTile(

lib/widget/order/so_shipment_detail.dart

@@ -218,6 +218,10 @@ class _SOShipmentDetailWidgetState
   List<Widget> shipmentTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.shipment.pk));
+    }
+
     final bool checked = widget.shipment.isChecked;
     final bool shipped = widget.shipment.isShipped;
     final bool delivered = widget.shipment.isDelivered;