Prevented auto-login from direct email confirmation actions

Was done for convenience but could potentially be exploited by an
attacker using signing up via one of these routes, then forwarding
an email confirmation to another user so they unknowingly utilise
an account someone else controls.

Tweaks the flow of confirming email, and the user invite flow.

For #3050

app/Http/Controllers/Auth/ConfirmEmailController.php

@@ -79,9 +79,8 @@ class ConfirmEmailController extends Controller
 
         $this->emailConfirmationService->deleteByUser($user);
         $this->showSuccessNotification(trans('auth.email_confirm_success'));
-        $this->loginService->login($user, auth()->getDefaultDriver());
 
-        return redirect('/');
+        return redirect('/login');
     }
 
     /**