Add sort lexicographical descendant for notes application

[Kokika]

No description provided.

[tobiasKaminsky]

Thank you very much for your contribution! 🎉

I tested it a bit and found that the "sorting header" is off:

Note "Sync" should be in "S", while the "New note…" should be in "N".
This works correct with ascending sort order.

[Kokika]

Thank you for testing the PR. I fixed the SectionI Item position at ordering. Could you check the fix?

[github-actions]

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