Print an error message only once if the connexion failed ?

[MangelMaxime]

Description

Some browsers don't support the redux dev tool extensions and so are being flooded by lot of errors.

Would you be ok if we try to capture the error and print the message only once ?

[et1975]

That would be great, ideally we'd get something from the debugger's client early on in the connection setup and abort the debugger hookup altogether.

[MangelMaxime]

I guess we should be able to detect the problem when doing connection.init.

And create a Model composition for the debugger extension in order to store if we have an active connection or not.

One question, is if we failed to init the connection should we re-try it later or no ?