Description
When the user opens a saved mass update record, the Mass Update Fields tab does not show even when using the Administrator role. It is likely
that the Mass Update record was created through a Mass Update script.
Solution
User can identify the associated script by looking at the URL of the Mass update record where it indicates the script ID.
Mass Update records which were created through Mass Update scripts will no longer show the Mass Update Fields tab,
since the settings are included on the script file itself.