Use encodeURIComponent in place of encodeURI for website new page title, in...

Use encodeURIComponent in place of encodeURI for website new page title, in order to escape special chars like question mark

addons/website/static/src/js/website.editor.newpage.js

@@ -47,7 +47,7 @@
                     }
                 }).then(function (val, field, $dialog) {
                     if (val) {
-                        var url = '/website/add/' + encodeURI(val);
+                        var url = '/website/add/' + encodeURIComponent(val);
                         if ($dialog.find('input[type="checkbox"]').is(':checked')) url +="?add_menu=1";
                         document.location = url;
                     }