Some fixes to featured listings

Fixes for when called by editing custom shortcode/widget
Updater class

Call when data needs to be updated from one version to the next.
Shortcode/Widget Admin pages

- Removed id's/classes/css/js that are not needed right now to simplify
the code. Add back in later as needed.
- Hide ability to make Neighborhood shortcode for now.
- Put shortcode template save/load in widget type class for now so that
it's in one place.