Chainsync termination doesn't trigger TX submission termination.

[karknu]

A peer that responds with IntersectNotFound will cause the node to terminate the Chainsync protocol with Done. However this does not appear to cause the connection to be torn down. TX submission is still running towards the pear.

[karknu]

There is a 300s timeout so if TX submission isn't able to terminate promptly the connection will get killed in 300s.

In the future the StTxIdsNonBlocking state should be updated to permit the transmission of MsgDone .