fix(note-editor): handle 'Restore to Default' changing fields

[david-allison]

Note

Assisted-by: Claude Fable 5

Fixes

• Fixes Restoring a note type to default doesn't update the fields #20510

Approach

Extract the refresh function, then call it on activity result

Also handle undo/redo in libAnki

How Has This Been Tested?

Unit tested

Learning

Matches upstream: pylib/anki/collection.py
ankitects/anki@9f3f6ba

Checklist

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner