XWIKI-19183: Wrong number of elements in LiveTable in case of view denied

Wrap the localization of platform.livetable.docNotViewable on a call to jsontool.serialize to form a valid javascript string.

xwiki-platform-core/xwiki-platform-web/xwiki-platform-web-war/src/main/webapp/resources/js/xwiki/table/livetable.js

@@ -359,7 +359,7 @@ XWiki.widgets.LiveTable = Class.create({
       // When a cell is part of a non-viewable row (except for the actions that simply stays empty), we display a 
       // message indicating that the content is not present because the current user does not have the right to view it.
       if (!row['doc_viewable'] && !row[fieldName]) {
-        const notViewableCellMessage = $services.localization.render('platform.livetable.docNotViewable');
+        const notViewableCellMessage = $jsontool.serialize($services.localization.render('platform.livetable.docNotViewable'));
         var td = new Element('td', {
           'class': [
             fieldName,