Launch the initial window based on the arg.
Launch the initial window based on the arg.

nteract/sidecar,nteract/sidecar,nteract/jupyter-sidecar,captainsafia/jupyter-sidecar,captainsafia/jupyter-sidecar,rgbkrk/jupyter-sidecar,rgbkrk/jupyter-sidecar,nteract/jupyter-sidecar