erp5_xhtml_style: in fckeditor check editable on gadget state and not in the list of modifications

product/ERP5/bootstrap/erp5_xhtml_style/SkinTemplateItem/portal_skins/erp5_ckeditor/ckeditor.gadget.js.js

@@ -187,7 +187,7 @@
           gadget.ckeditor.destroy();
         }
         // Create a new editor
-        if (!modification_dict.editable) {
+        if (!gadget.state.editable) {
           configuration = gadget.state.configuration_readonly;
         } else if (gadget.state.is_responsive && gadget.state.is_mobile) {
           configuration = gadget.state.configuration_mobile;