Fixes for part category table

(cherry picked from commit f7ef309995f8a52c213748f4a9226724e288c936)

InvenTree/part/templates/part/category.html

@@ -210,7 +210,8 @@
                 {% else %}
                 parent: null,
                 {% endif %}
-            }
+            },
+            allowTreeView: true,
         }
     );