Doc & Forum Search Enhancements

[rgstephens]

These are additional enhancements that we didn't get to from #355

• current dialog below suggests the top 2 search results, do we want just the top result, how many?
• need to clarify distinction between techincal_question and out_of_scope, too many questions going to OOS so we don't do search
• several technical_question intent examples are dropping below the 0.8 nlu_threshold?? Here are a couple of examples:
  • which language is rasa programmed in
  • can you help me with this problem
• improve Discourse search as mentioned in comments above
• Consider always adding a Search Docs button to action_default_ask_affirmation? It would invoke action_docs_search.
• Right now we have an utterance utter_search_bar that tells people if we can't explain the nlu part they are asking about, they should use the search bar. this should trigger a technical question for the question they asked instead.