refactor: simplified CSV testing

lib/new-admin/services/transactions.js

@@ -141,14 +141,14 @@ function batch (
 
   return Promise.all(promises)
     .then(packager)
-    .then(res => {
-      if (simplified) return simplifiedBatch(res)
+    .then(res =>
+      !isCsvExport ? res :
       // GQL transactions and transactionsCsv both use this function and
       // if we don't check for the correct simplified value, the Transactions page polling
       // will continuously build a csv in the background
-      else if (simplified === false) return advancedBatch(res)
-      return res
-    })
+      simplified ? simplifiedBatch(res) :
+      advancedBatch(res)
+    )
 }
 
 function advancedBatch (data) {