timeout for channel clean up

Hello

I see the chat channel is destroyed immediately after last user leave it
it is unacceptable for our games
We have alot of players online, but they rarely visit chat channel, just to check for news
since the channel is cleared several times a day so every first user see the empty channel without any messages
that is not what we need

Is there the possibility to setup a delay ( hour, day or week )
before cleanup the channel after all users exit ?

If not, this is my feature request