Move button to switch from JupyterLab to Notebook

[lahwaacz]

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As shown in https://github.com/jupyter/jupyter/issues/420#issuecomment-1670707729, the button Launch Jupyter Notebook File Browser is located in the Help menu in JupyterLab. On the other hand, Jupyter Notebook 7 has an Open JupyterLab button in the View menu. I would like to suggest moving Launch Jupyter Notebook File Browser from Help to View for consistency.

[jtpio]

Thanks @lahwaacz for opening the issue.

This is where the menu entry is defined:

https://github.com/jupyter/notebook/blob/b5133c67f1a5c9c87d99abc44b7b04e6214aca45/packages/lab-extension/schema/launch-tree.json#L7-L12

To put it under View we would need to update to the following:

"id": "jp-mainmenu-view"

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For reference here is the PR that added the menu entry to RetroLab (the ancestor of Notebook 7): https://github.com/jupyterlab/retrolab/pull/138

[jayeshsingh9767]

@jtpio could u please assign this to me, will like to take this up.