XWIKI-22010: The rights buttons for Unregistered Users do not display…

… anymore the value set after page refresh

* Replaced the string value when calling MSCheckbox for guest users with an int value, like it is done for any other user

xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-resources/src/main/resources/flamingo/rightsUI.vm

@@ -342,7 +342,7 @@ $xwiki.ssfx.use('js/xwiki/table/livetable.css', true)
       var ta = new XWiki.widgets.LiveTable("$url", "usersandgroupstable", callback, {"filtersNode": $('usersandgroupstable')});
     #foreach($i in [0..$maxlevel])
       #if ($currentAllowed[$i])
-        var chbx${i} = new MSCheckbox($("td${levelsRights.get($i)}"), "${levelsRights.get($i)}", window.saveUrl, "${r.get($i)}");
+        var chbx${i} = new MSCheckbox($("td${levelsRights.get($i)}"), "${levelsRights.get($i)}", window.saveUrl, $r.get($i));
       #end
     #end
       Event.observe(window, 'load', function() {