continue ignore_incorrect for render_const()

jsonform/gadget_json_generated_form_child.js

@@ -259,10 +259,14 @@
       ser_doc = JSON.stringify(json_document),
       ser_const = JSON.stringify(schema.const);
     input.setAttribute('readonly', true);
-    if (json_document === undefined || deepEqual(json_document, schema.const)) {
+    if (json_document === undefined || g.props.ignore_incorrect ||
+        deepEqual(json_document, schema.const)) {
       if (json_document === undefined) {
         g.props.changed = true;
       }
+      if (!deepEqual(json_document, schema.const)) {
+        g.props.changed = true;
+      }
       input.setAttribute('data-origin-value', ser_const);
       if (schema.title) {
         input.value = schema.title;