Logout redirect

Problem/Motivation

There is an unusual behavior observed after logging out and being redirected to the front page.

Steps to reproduce

1. Log in using Office 365.
2. Click on 'Logout' (user/logout).
3. User is redirected to Microsoft's sign out screen with the message 'You signed out of your account'.
4. Upon returning to the site, the user remains logged in, even after closing the browser.

Proposed resolution

In the public function logout() :
from:
Url::fromRoute(''
to:
Url::fromRoute('user.logout');

This has already been tested in the production environment.

2- It might be a nice addition to have the option to specify where the user should be redirected after logging out?

Thanks for this great module!