The Detail Pane View should display code that "looks all right" (including SQL and Markup).

This feature has been extracted out of

This should provide as simple generalized view of the data as per the referenced issue.

The code should be JSON de-serialized and presented in a way that is readable and friendly.

The code in the Node Details Pane could simply have a length check that can be clicked.

This click could then open up a modal on the page that displays the full source code.

This should also be done for the SQL values.

This should include large text and HTML markup values.
(The large text and HTML markup is primarily needed by the text/plain and text/html parts of an e-mail.)