Better endpoint to move transactions.

config/bulk.php

@@ -0,0 +1,14 @@
+<?php
+
+use FireflyIII\Enums\ClauseType;
+
+return [
+    ClauseType::TRANSACTION => [
+        ClauseType::WHERE => [
+            'source_account_id' => 'required|numeric|belongsToUser:accounts,id',
+        ],
+        ClauseType::UPDATE => [
+            'destination_account_id' => 'required|numeric|belongsToUser:accounts,id',
+        ],
+    ],
+];