Add "safe_key" option for "Webform submission data: Value" in Views

When using a "Select options" component, when trying to output the field in Views using "Webform submission data: Value" there doesn't seem to be a way to output the "safe_key" as defined in the key-value pairs. (Key-value pairs MUST be specified as "safe_key|Some readable option".)

For instance if you define:

foo_key|Foo readable option

...as an option, I'd like to be able to output "foo_key" instead of "Foo readable option".

I can see that the safe_key value is in the render array given as a parameter in line 219 of webform/views/webform_handler_field_submission_data.inc

...but there's no way to actually display that value instead of rendering the field (which ends up displaying the readable option).