Add missing Italian translations for admin nav: import, sounds, translations

src/messages/it.json

@@ -703,11 +703,14 @@
         "emailTemplates": "Template email",
         "theme": "Tema",
         "media": "Media",
+        "favicon": "Favicon",
+        "sounds": "Suoni",
+        "translations": "Traduzioni",
+        "import": "Importa",
         "settings": "Impostazioni",
         "backToSite": "Torna al sito",
         "hotelManagementPanel": "Pannello di gestione hotel",
-        "rankLabel": "Grado {rank}",
-        "favicon": "Favicon"
+        "rankLabel": "Grado {rank}"
       },
       "dashboard": {
         "title": "Dashboard",