schema.default value used for render object's type field.

jsonform/gadget_json_generated_form_child.js

@@ -1211,8 +1211,13 @@
     }
 
     if (default_dict === undefined) {
+      if (json_field.hasOwnProperty('default')) {
+        default_dict = json_field.default;
+        g.props.changed = true;
+      } else {
         default_dict = {};
       }
+    }
 
     return expandProperties(g, json_field.properties, schema_path + '/properties/', required)
       .push(function (ret) {