Opening from "running" panel does not use collaborative mode

[Zsailer]

Description

If you click on the document in the "Running" panel, you will open a non-collaborative Notebook view.

Reproduce

1. Open a notebook from the file-browser (or start a new notebook)
2. Go to the "Running" left panel.
3. Click on that same notebook from this panel.
4. You will get a second view of the Notebook that is not in collaborative mode.

Expected behavior

Opening a document from the "Running" panel should also open in collaborative model.

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[davidbrochart]

Thanks Zach, it's probably because of the RTC: prefix of the custom YDrive. This has been a major source of issues, as a lot of JupyterLab extensions don't handle Jupyter drives, and even in JupyterLab core this is not a well supported feature.
In the long run, I think it will require making the JupyterLab default drive a proper drive. But we can fix this issue with the running panel before that.

[Zsailer]

Thanks @davidbrochart. That's right. We noticed the prefix isn't used when opening from the running panel.

Do we fix this in JupyterLab core now, in the running-extension? Or is this a Jupyter-collaboration plugin that replaces the necessary parts of the running-extension when RTC is enabled?

[krassowski]

The next version of jupyter-collaboration will no longer include the RTC: prefix, to test it today, see: #202 (comment).

I tested that this is no longer an issue in 4.0.0a0 of jupyter-collaboration - closing.