926 xsss amelioration ux wording et organisation des settings securite

[NicolasBuquet]

Fix #926

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[areox-net]

@NicolasBuquet Merci pour toutes ces modifications! J'ai juste un doute: quand la Sauvegarde Auto n'est pas active (donc pas de deuxième bouton "Gerer la sauvegarde") le bouton dit "Générer un nouveau code" aussi? Il devrait plutot dire "Activer sur cet appareil"

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