Refactor part form fields

lib/inventree/part.dart

@@ -137,6 +137,32 @@ class InvenTreePart extends InvenTreeModel {
   @override
   String get URL => "part/";
 
+  @override
+  Map<String, dynamic> formFields() {
+    return {
+      "name": {},
+      "description": {},
+      "IPN": {},
+      "revision": {},
+      "keywords": {},
+      "link": {},
+
+      // Parent category
+      "category": {
+      },
+
+      // Checkbox fields
+      "active": {},
+      "assembly": {},
+      "component": {},
+      "purchaseable": {},
+      "salable": {},
+      "trackable": {},
+      "is_template": {},
+      "virtual": {},
+    };
+  }
+
   @override
   Map<String, String> defaultListFilters() {
     return {

lib/widget/category_display.dart

@@ -226,12 +226,12 @@ class _CategoryDisplayState extends RefreshableState<CategoryDisplayWidget> {
       onSuccess: (data) async {
         
         if (data.containsKey("pk")) {
-          var new_cat = InvenTreePartCategory.fromJson(data);
+          var cat = InvenTreePartCategory.fromJson(data);
 
           Navigator.push(
             context,
             MaterialPageRoute(
-              builder: (context) => CategoryDisplayWidget(new_cat)
+              builder: (context) => CategoryDisplayWidget(cat)
             )
           );
         } else {

lib/widget/part_detail.dart

@@ -100,35 +100,12 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
 
   void _editPartDialog(BuildContext context) {
 
-    launchApiForm(
+    part.editForm(
-        context,
+      context,
-        L10().editPart,
+      L10().editPart,
-        part.url,
+      onSuccess: (data) async {
-        {
+        refresh();
-          "name": {},
+      }
-          "description": {},
-          "IPN": {},
-          "revision": {},
-          "keywords": {},
-          "link": {},
-
-          "category": {
-          },
-
-          // Checkbox fields
-          "active": {},
-          "assembly": {},
-          "component": {},
-          "purchaseable": {},
-          "salable": {},
-          "trackable": {},
-          "is_template": {},
-          "virtual": {},
-        },
-        modelData: part.jsondata,
-        onSuccess: (data) async {
-          refresh();
-        },
     );
   }