Add translations for linking new statistic functions in navigation

backend/iw/basis.json

@@ -110,6 +110,7 @@
         "articles_choose": "Select an article",
         "articles_input": "Add an article",
         "annotations": "Annotations",
-        "catalogue_raisonne": "Catalogue raisonne"
+        "catalogue_raisonne": "Catalogue raisonne",
+        "statistics": "Statistics"
     }
 }