[FIX] web_editor: image name

Add the image name when the image is uploaded.

Complement of commits 886c07dabb and 152e3f8686

opw-1880472

addons/web_editor/static/src/js/widgets/widgets.js

@@ -286,7 +286,7 @@ var ImageDialog = Widget.extend({
             $form.find('.well > span').remove();
             $form.find('.well > div').show();
             _.each(attachments, function (record) {
-                record.src = record.url || '/web/image/' + record.id;
+                record.src = record.url || _.str.sprintf('/web/image/%s/%s', record.id, encodeURI(record.name)); // Name is added for SEO purposes
                 record.is_document = !(/gif|jpe|jpg|png/.test(record.mimetype));
             });
             if (error || !attachments.length) {