ConstructWidget contents

[mbonig]

Right now the ConstructWidget just has the name and the type, but that's pretty boring. Sadly this is all that's provided by the Tree file, but I think there is an opportunity to also go into the Cfn templates and grab properties, at least for the Cfn* constructs.

There could be a clever way to go into source code and grab all the 'props' sent in and render those too...