Added missing translations in the italian translation

translations/it.ts

@@ -917,6 +917,10 @@ Disabilitando la cronologia delle chat lascerà la cronologia criptata intatta (
         <comment>Menu to remove the friend from our friendlist</comment>
         <translation>Rimuovi contatto</translation>
     </message>
+    <message>
+        <source>Show details</source>
+        <translation>Mostra dettagli</translation>
+    </message>
     <message>
         <location filename="../src/widget/friendwidget.cpp" line="111"/>
         <source>Choose an auto accept directory</source>
@@ -1475,6 +1479,10 @@ will be sent to them when they appear online to you.</source>
         <source>Set title...</source>
         <translation>Imposta nome gruppo...</translation>
     </message>
+    <message>
+        <source>Open chat in new window</source>
+        <translation>Apri la chat in una nuova finestra</translation>
+    </message>
     <message>
         <location filename="../src/widget/groupwidget.cpp" line="74"/>
         <source>Group title</source>