[FIX] website: make ?enable_seo more robust

Sometimes we try to append a query string to an url, but if there is a remaining anchor, the query string will not be added at the right place.

The title and description tags might not exist (translated page) so it would be displaying false instead of empty string.

PR: #27110
task-1885419

addons/website/static/src/js/menu/seo.js

@@ -217,13 +217,10 @@ var HtmlPage = Class.extend(mixins.PropertiesMixin, {
         this.initDescription = this.description();
     },
     url: function () {
-        var url = window.location.href;
-        var hashIndex = url.indexOf('?');
-        return hashIndex >= 0 ? url.substring(0, hashIndex) : url;
+        return window.location.origin + window.location.pathname;
     },
     title: function () {
-        var $title = $('title');
-        return ($title.length > 0) && $title.text() && $title.text().trim();
+        return $('title').text().trim();
     },
     changeTitle: function (title) {
         // TODO create tag if missing
@@ -231,8 +228,7 @@ var HtmlPage = Class.extend(mixins.PropertiesMixin, {
         this.trigger('title-changed', title);
     },
     description: function () {
-        var $description = $('meta[name=description]');
-        return ($description.length > 0) && ($description.attr('content') && $description.attr('content').trim());
+        return ($('meta[name=description]').attr('content') || '').trim();
     },
     changeDescription: function (description) {
         // TODO create tag if missing
@@ -801,7 +797,7 @@ var SeoMenu = websiteNavbarData.WebsiteNavbarActionWidget.extend({
     init: function (parent, options) {
         this._super(parent, options);
 
-        if (window.location.href.includes('enable_seo')) {
+        if ($.deparam.querystring().enable_seo !== undefined) {
             this._promoteCurrentPage();
         }
     },