[FIX] website: hide logo height scrolled option if no logo

Before this commit, the logo height scrolled option was displayed even
if there was no logo.

It was because the condition to display or not this option (in the
"_computeWidgetVisibility") had not been updated correctly when the DOM
of the navbar was refactored.

task-2800680

closes odoo/odoo#98321

X-original-commit: 2b2ff732914e6c491e48540958bec967a3acfe33
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/src/js/editor/snippets.options.js

@@ -2081,7 +2081,7 @@ options.registry.HeaderNavbar = options.Class.extend({
     async _computeWidgetVisibility(widgetName, params) {
         switch (widgetName) {
             case 'option_logo_height_scrolled': {
-                return !this.$('.navbar-brand').hasClass('d-none');
+                return !!this.$('.navbar-brand').length;
             }
             case 'no_hamburger_opt': {
                 return !weUtils.getCSSVariableValue('header-template').includes('hamburger');