Differenciate between classified and unclassified Unknown-other

[nagarrido]

Describe the enhancement you'd like
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It would be nice to have separate the unknown faces that are detected from the ones that have been manually set to unknown-other

Describe why this will benefit the LibrePhotos
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Sometimes, familiar faces in weird illuminations or angles are put into unknown others, but other faces are indeed of people you do not know. Separating both cases would help in the manual classification of photos, as right now one has to look into all the unknown faces to check if known faces have appeared.

Additional context
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Maybe the non-classified unknown faces could go into Inferred, and the classified ones into Labeled (or a separate section)