erp5_hal_json_style: get extra configuration

bt5/erp5_hal_json_style/SkinTemplateItem/portal_skins/erp5_hal_json_style/ERP5Document_getHateoas.py

@@ -552,6 +552,9 @@ def renderField(traversed_document, field, form, value=MARKER, meta_type=None,
                    "LinesField", "ImageField", "FileField", "IntegerField",
                    "PasswordField", "EditorField", "HyperLinkField", "LinkField"):
     if meta_type in ("StringField", "EmailField"):
+      extra_dict =  field.get_value("extra")
+      if extra_dict:
+        result.update(extra_dict)
       result.update({
         "maxlength": field.get_value("display_maxwidth"),
       })
@@ -590,6 +593,12 @@ def renderField(traversed_document, field, form, value=MARKER, meta_type=None,
       # thus trying to return it to the client, besides being useless, breaks
       # the hal API
       del result["default"]
+
+    if meta_type == "TextAreaField":
+      extra_dict =  field.get_value("extra")
+      if extra_dict:
+        result.update(extra_dict)
+
     return result
 
   if meta_type == "DateTimeField":