Pontoon: Update Italian (it) localization of TW Power Tools

Co-authored-by: Luca <maruttiluca0@gmail.com>
diff --git a/src/static/_locales/it/messages.json b/src/static/_locales/it/messages.json
index 8b21199..c564724 100644
--- a/src/static/_locales/it/messages.json
+++ b/src/static/_locales/it/messages.json
@@ -159,6 +159,18 @@
     "message": "Mostra l'attività suddivisa per forum nei profili.",
     "description": "Feature checkbox in the options page"
   },
+  "options_interopthreadpage": {
+    "message": "Mostra <span id='interopthreadpage_mode--container'></span> nella Community Console.",
+    "description": "Feature checkbox in the options page. \"<span id='interopthreadpage_mode--container'></span>\" will be substituted with a selector which allows users to select whether they want the new thread page design or the old one."
+  },
+  "options_interopthreadpage_mode_previous": {
+    "message": "il vecchio design della pagina dei thread",
+    "description": "Select option added in #interopthreadpage_mode--container, in the options_interopthreadpage string"
+  },
+  "options_interopthreadpage_mode_next": {
+    "message": "il nuovo design della pagina dei thread",
+    "description": "Select option added in #interopthreadpage_mode--container, in the options_interopthreadpage string"
+  },
   "options_save": {
     "message": "Salva",
     "description": "Button in the options page to save the settings"