Added support for '<--slug' creating a popup, like --- for dividers
Added 'title' data to every form element.
Updated popup to dynamically create preview text if not provided explicitly.
Added .get( 'copiedModel' ) for fields based on duplicated models.
Added .get( 'copiedModel' ) for fields based on duplicated models.
Media items now correctly duplicate their picture on clone.
Styling updates for popup preview text