The transaction history of edits to a form are not easily discovered. (or I'm an idiot) (or both)

1. Visit https://secure.phabricator.com/transactions/editengine/maniphest.task/view/3/ and observe: epriestley updated the preamble for this form.
2. Fail to suppress an insatiable desire to unearth the mischief that occurred here.
3. Use Conduit to map the PHID-FORM-<id> to the PHID-XACT-FORM-<id> in question.
4. Manually construct a PhabricatorApplicationTransactionDetailController URI using the discovered PHID: https://secure.phabricator.com/transactions/detail/PHID-XACT-FORM-eyi3pasan6nnjjj/
5. Mystery solved.

Expected behavior: epriestley updated the preamble for this form. should have a (Show Details) link as a shortcut in place of console queries and manual URI construction.

It looks like this is not the case because:

• Detail URIs are not rendered when called with isPreview: https://secure.phabricator.com/diffusion/P/browse/master/src/applications/transactions/view/PhabricatorApplicationTransactionView.php;b822ceb6d563ea785b42144ee1fdedfd2a4f8566$432
• PhabricatorEditEngineConfigurationViewController sets isPreview.

Is there another View that displays the form's transaction history in non-preview mode, or is the rendering logic misbehaving?