add exlanation comment

app/components/SimpleEditor/elements/track_change/TrackChangeComponent.js

@@ -33,6 +33,11 @@ class TrackChangeComponent extends AnnotationComponent {
       container.addClass('sc-accept-reject-container-hide')
     }
 
+    // .attr('status', status and .attr('roles', user.roles[0]) Only Exist because
+    // on the second editor we do not have an exporter but everything is pushed to
+    // the note-content property of the callout. So cause we use olny the importer
+    // those attr did not exist
+
     let el = $$('track-change')
       .attr('data-id', id)
       .attr('title', user.username)