message: don't dismiss toasts for device verification
  as they are immediately started
diff: @@ -56,7 +56,10 @@ export default class VerificationRequestToast extends React.PureComponent {
  _checkRequestIsPending = () => {
  const {request} = this.props;
  - if (request.ready || request.started || request.done || request.cancelled || request.observeOnly) {
  + const isPendingInRoomRequest = request.channel.roomId &&
  + !(request.ready || request.started || request.done || request.cancelled || request.observeOnly);
  + const isPendingDeviceRequest = request.channel.deviceId && request.started;
  + if (!isPendingInRoomRequest && !isPendingDeviceRequest) {
  ToastStore.sharedInstance().dismissToast(this.props.toastKey);
  }
  };
  