Make Notebook preferences registration substitutable #13926
Merged
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What it does
Implement the commonly employed pattern for preference contribution registration to enable substitution of the Notebook preference schema.
Fixes #13913
How to test
Verify that the Notebook preferences appear in the Settings panel as before.
Open some kind of notebook and verify that the specific preference settings have the expected effect on notebook behaviour, output, etc. For example, in a GitHub Issues Notebook, create a code cell, enter some code, and toggle the line numbers preference setting to see how line numbers appear or not in the cell editor.
Follow-ups
No follow-up is identified at this time.
Review checklist
Reminder for reviewers