polish: listen for network idle after DCL (#2271)
polish: listen for network idle after DCL (#2271)


deepanjanroy/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,ev1stensberg/lighthouse,tkadlec/lighthouse,tkadlec/lighthouse,mixed/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,tkadlec/lighthouse,arturmiz/lighthouse,GoogleChrome/lighthouse,arturmiz/lighthouse,ev1stensberg/lighthouse,tkadlec/lighthouse,mixed/lighthouse,umaar/lighthouse,deepanjanroy/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,mixed/lighthouse,arturmiz/lighthouse,mixed/lighthouse,umaar/lighthouse,umaar/lighthouse,arturmiz/lighthouse,arturmiz/lighthouse,umaar/lighthouse,ev1stensberg/lighthouse,deepanjanroy/lighthouse