(#39) portal: added JSON-schema formats 'topic', 'sub-topic' and 'flag-topic' to the widget loader.
Merge branch 'feature/39-widget-loader-add-topic-and-sub-topic-formats'

* feature/39-widget-loader-add-topic-and-sub-topic-formats:
  (#39) portal: added JSON-schema formats 'topic', 'sub-topic' and 'flag-topic' to the widget loader.