Currently when a user restarts a conversation, the user starts "from scratch" every time. This can be useful sometimes, but when a user is actively debugging and developing a bot, they don't care to run-through the conversation from the beginning.

We would like to add a feature in the Emulator to restart a conversation from a point in time in the conversation's transcript, so the user could skip this boilerplate and move right to the area of the conversation that they care about. Achieving this would be a bit more that just rendering the transcript in question, but actively sending messages on behalf of the user until you've reached the correct point in the conversation. It makes sense to restart to the current conversation point to the last position it was at -1 turn. The control to trigger this behavior should extend off the existing restart conversation control or sit next to the Save Transcript.

[enhancement]