Opening a notebook in a codespace

[DonJayamanne]

@kieferrm commented on Wed Mar 24 2021

1. open a ipynb file in a codespace
   ->
   

Issues:

1. python extension activation shows the welcome page stealing the focus from the notebook that I opened //cc @brettcannon
2. I get immediately asked for a survey
3. the kernel port gets forwarded (this is a missing API adoption, @alexr00 has the details)

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[karthiknadig]

We have removed this getting started page.