On collab mode editor hangs on refresh in case of network outage

When network is down between Studio client and collab server (but Studio server is reachable)
Refreshing an editor page fails, the editor area stay blank waiting to be rendered, moving to other editor
raised js error.

A work around is to refresh the page on a non editor page (welcome page/list of schemas ...)

This is because the lock message is queued while the connection is not yet initialized, then the collab mode is disable because of
network outage (or because collab server is down):

POST ....
vertx creating event bus: http://localhost:8180/eventbus
Message sent to 'project.' while channel was disconnected: {"action":"lock", "force":false,"projectid":"foo", "featureid":"ze.ds","sessionid":6,"userid":"ben"}
GET http://localhost:8180/eventbus/info
Websocket failing to establish connection, give up collab mode, bye.

At least navigating to other location should work without errors.