Render link to "parent template part" (if it exists)

lib/widget/part_detail.dart

@@ -37,6 +37,8 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
 
   InvenTreePart part;
 
+  InvenTreePart? parentPart;
+
   @override
   String getAppBarTitle(BuildContext context) => L10().partDetails;
 
@@ -92,6 +94,21 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
       Navigator.of(context).pop();
     }
 
+    // If the part points to a parent "template" part, request that too
+    int? templatePartId = part.variantOf;
+
+    if (templatePartId == null) {
+      parentPart = null;
+    } else {
+      final result = await InvenTreePart().get(templatePartId);
+
+      if (result != null && result is InvenTreePart) {
+        parentPart = result;
+      } else {
+        parentPart = null;
+      }
+    }
+
     await part.getTestTemplates();
   }
 
@@ -182,6 +199,26 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
       );
     }
 
+    if (parentPart != null) {
+      tiles.add(
+        ListTile(
+          title: Text(L10().templatePart),
+          subtitle: Text(parentPart!.fullname),
+          leading: InvenTreeAPI().getImage(
+            parentPart!.thumbnail,
+            width: 32,
+            height: 32,
+          ),
+          onTap: () {
+            Navigator.push(
+              context,
+              MaterialPageRoute(builder: (context) => PartDetailWidget(parentPart!))
+            );
+          }
+        )
+      );
+    }
+
     // Category information
     if (part.categoryName.isNotEmpty) {
       tiles.add(