[FIX] test_themes: restore the website switcher

The forward-port of [1] made no adaptation to the code, and it now
simply crashes when trying to use the website switcher when test_themes
is installed.

This also fixes a linter error introduced by that same [1] commit.

[1]: https://github.com/odoo/design-themes/commit/c3af5d9796929025c9503ab639afc8c60a262b3f

closes odoo/design-themes#1037

X-original-commit: a5a838e84f
Related: odoo/odoo#191567
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

test_themes/static/src/systray_items/website_switcher.js

@@ -29,13 +29,13 @@ patch(WebsiteSwitcherSystray.prototype, {
 
     getElements() {
         // Add tooltip information
-        const elements = this._super();
+        const elements = super.getElements(...arguments);
         return elements.map((elem) => {
             elem.dataset = {
                 ...elem.dataset,
                 ...this.tooltips[elem.id]
             };
-            return elem
+            return elem;
         });
     },