Added saved settings widget

[abujeda]

Created a saved settings widget to display the saved settings in the homepage.

Sample configuration:

    dashboard_layout:
      rows:
        - columns:
            - width: 12
              widgets:
                - "saved_settings"
                - "pinned_apps"

[abujeda]

Some screenshots of the widget:

[johrstrom]

Hey, sorry for the delay - I'm preparing for Summer Institute which is eating a lot of my time/focus. Which is to say - I may not get to this quickly.