fixes https://github.com/Microsoft/BotFramework-WebChat/issues/631
fixes https://github.com/Microsoft/BotFramework-WebChat/issues/631

billba/botchat,billba/botchat,danmarshall/BotFramework-WebChat,billba/botchat,danmarshall/BotFramework-WebChat,danmarshall/BotFramework-WebChat