UDP Timeout should be Configurable via Console

The following Shell Command should be implemented to be available in a Console command:

XG125w_XN02_SFOS 116.01# sysctl -w net.ipv4.netfilter.ip_conntrack_udp_timeout_stream=180

TCP Timeouts are allready implemented in the following way:

console> set advanced-firewall tcp-est-idle-timeout

Reason for this Request:
The sysctl Command is not persistent and is resetted after the Firewall is booted once. If you would include this into your configuration, this would be persistent.

As far as I know, this Request should be allready existing at Sophos's Side. Could you please give a hint, if it's planned to include this to the v16 Release?