With ApplicationEditor/EditEngine, form controls may be locked (causing them to render disabled) and form controls are rendered as disabled in the form preview in the "edit an edit form" UI.
Some controls like the policy controls, tokenizers, and remarkup control do not have an identifiable "disabled" state: they don't appear visually disabled, and in some cases still support interactions.
They should not: all controls should visually appear disabled, and be nonresponsive in their disabled states.