Along with publishing settings changes, hitting Save & Publish in the customizer could publish the draft or update the published post. If previewing a non-published post, the saved state for the customizer should start out as dirty, so that the Save button can be submitted.
Along with publishing settings changes, hitting Save & Publish in the customizer could publish the draft or update the published post. If previewing a non-published post, the saved state for the customizer should start out as dirty, so that the Save button can be submitted.