Add a stop button #3
Description
The stop button will be shown when send is disabled (meaning the agent is answering). It is only shown when the attribute stoppable on the component is set to "auto", "manually". On click an event "userStopped" is sent and the send button is activated if "auto" is set. If manually is set a function agentStopped must be called manually (to enable additional clean up before enable the user to send again if needed).