Draft conversation responses

It would be really helpful if there were a way to save a Draft version of a response to a customer. This helps people being trained and situations where you need a Team Lead or other supervisor to approve the response before it is officially sent to the customer. After reviewing the draft and making any necessary modifications, the agent could easily send. This avoids a lot of Notes cluttering up the conversation flow with various response versions or having to do the response creation and approval outside of Intercom.