message: Destroy playback instance on unmount
diff: @@ -75,6 +75,12 @@ export default class MVoiceMessageBody extends React.PureComponent<IProps, IStat
  // Note: the RecordingPlayback component will handle preparing the Playback class for us.
  }
  + public componentWillUnmount() {
  + if (this.state.playback) {
  + this.state.playback.destroy();
  + }
  + }
  +
  public render() {
  if (this.state.error) {
  // TODO: @@TR: Verify error state
  