Use notebook URI as context for toolbar commands

[msujew]

What it does

Fixes the Restart Kernel command of the jupyter notebook extension. It expects a URI as its argument. We used to pass in the whole notebook model.

How to test

1. Open a Jupyter notebook file
2. Run the Restart Kernel command from the main toolbar
3. The kernel should restart (see notification) and then work as expected

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[jonah-iden]

This is actually what the ArgumentProcessor in notebooks.ts/notebooks-main.ts was for. Wouldn't that be a nicer solution than or does that not work because it needs the uri and not the document

[msujew]

This is actually what the ArgumentProcessor in notebooks.ts/notebooks-main.ts was for. Wouldn't that be a nicer solution than or does that not work because it needs the uri and not the document

@jonah-iden Well, the ArgumentProcessor correctly converted the NotebookModel into a theia.NotebookDocument on the plugin host. However, this isn't the type that's expected by commands registered to the interactive/toolbar menu. The command here expects a vscode.Uri, not vscode.NotebookDocument.

[jonah-iden]

ok then its as i thought. Approved