[CI4] Toolbar DB Query And Event Duplication

Good news!! This has been fixed in latest develop branch.

I didnt realize until now, after replacing the new system directory, the routes defined in Config/Routes.php with $route->post() shows 404 instead of the requested page ( authentication attempt, login/register/reset etc ).
I do not have the time to investigate the issue so I had to put back the previous system dir.
I will investigate it as soon as I get some free time.