Fixed filter location and query nulls

pages/Operations - Unused Items/queries/unused_items/unused_items.txt

@@ -31,5 +31,8 @@ LEFT JOIN (
     GROUP BY isite.itemsite_item_id
 ) last_txn ON last_txn.itemsite_item_id = i.item_id
 WHERE (CURRENT_DATE - COALESCE(last_txn.last_transaction_date, i.item_created, cc.comment_date)::date)
-      >= COALESCE(NULLIF('{{UnusedDays.text}}','')::int, 365)
+      >= CASE
+           WHEN '{{UnusedDays.text}}' ~ '^\d+$' THEN '{{UnusedDays.text}}'::int
+           ELSE 365
+         END
 ORDER BY "Days Unused" DESC