Add a configuration tool for automatic updates

Add a configuration tool for automatic updates. If the device is gateway (e.g IQD-GW-01) show the configuration tool during the installation process.

Documentation for Debian-based distributions: https://wiki.debian.org/UnattendedUpgrades

Options:

• enable/disable: APT::Periodic::Enable,
• package list updating interval in days: APT::Periodic::Update-Package-Lists (only for power users, default 1 day),
• upgrade packages interval in days: APT::Periodic::Unattended-Upgrade (default 1 day),
• removing unnecessary packages interval in days: APT::Periodic::AutocleanInterval (only for power users, default 0 = disabled)
• automatic reboot (only for kernel updates): Unattended-Upgrade::Automatic-Reboot (default = false)