Fix new instance launching

[ivanbarsukov]

Solves #12

[vedrk5672]

Please add the check to see if debugpy server is already started or not on the given port, as it is not possible to close the listening on that port number even if plugin is reloaded, it is throwing error, just add a check if listening in on, don't start the server again

[ivanbarsukov]

Please add the check to see if debugpy server is already started or not on the given port, as it is not possible to close the listening on that port number even if plugin is reloaded, it is throwing error, just add a check if listening in on, don't start the server again

It looks like the described issue is not related to this PR and is not a blocker to fixing the current issue that is affecting many users. If I find time to resolve this, I'll be sure to send another PR.