display model pk entries (#851)

lib/widget/company/company_detail.dart

@@ -239,6 +239,10 @@ class _CompanyDetailState extends RefreshableState<CompanyDetailWidget> {
       ),
     );
 
+    if (showPk) {
+      tiles.add(pkTile(widget.company.pk));
+    }
+
     if (!widget.company.active) {
       tiles.add(
         ListTile(

lib/widget/company/manufacturer_part_detail.dart

@@ -125,6 +125,10 @@ class _ManufacturerPartDisplayState
   List<Widget> getTiles(BuildContext context) {
     List<Widget> tiles = [];
 
+    if (showPk) {
+      tiles.add(pkTile(widget.manufacturerPart.pk));
+    }
+
     // Internal Part
     tiles.add(
       ListTile(

lib/widget/company/supplier_part_detail.dart

@@ -146,6 +146,10 @@ class _SupplierPartDisplayState
       return tiles;
     }
 
+    if (showPk) {
+      tiles.add(pkTile(widget.supplierPart.pk));
+    }
+
     // Internal Part
     tiles.add(
       ListTile(