[*] BO: Add an option to autologout to the backoffice after 15 minutes

classes/controller/AdminController.php

@@ -1998,6 +1998,14 @@ class AdminControllerCore extends Controller
 
 		if (isset($_GET['logout']))
 			$this->context->employee->logout();
+			
+		if (isset(Context::getContext()->cookie->last_activity))
+		{
+			if ($this->context->cookie->last_activity + 900 < time())
+				$this->context->employee->logout();
+			else
+				$this->context->cookie->last_activity = time();
+		}
 
 		if ($this->controller_name != 'AdminLogin' && (!isset($this->context->employee) || !$this->context->employee->isLoggedBack()))
 		{