*: test_website_modules
This commit restores the display of the website loader (the "Building
your website" GIF) during the installation of a module from the new
content modal, or after completing the configurator flow.
Follows the merge of the "website in backend" task at [1].
[1]: https://github.com/odoo/odoo/commit/31cc10b91dc7762e23b4bde9b945be0c4ce3fe3b
task-2687506
Part-of: odoo/odoo#81485