Feature request: Additional placeholders for custom fields

Additional placeholders for custom fields.

It would be nice if there could be a placeholder for custom fields (and non-custom fields) to display a custom field's:

1. Display name
2. Description
3. Title shown to customers
4. Description shown to customers

For example, we have a custom fields that collects information for enhancement requests and sends it to an email address. For example there is a custom field called "What is the impact to your business?" and it is a free-text field to fill out.

While we are able to accomplish this by sending an email with this information:

 What is the impact to your business? {{ticket.ticket_field_1234}}

But it would be nice if we could set it to something like:

{{ticket.ticket_field_1234.displayname}} {{ticket.ticket_field_1234}}

This way we would not need to change the email trigger if we ever update the Description or Display names.