message: kill stream when using gUM for permission to device labels to kill camera
diff: @@ -284,7 +284,12 @@ module.exports = React.createClass({
  this.setState({ electron_settings: settings });
  },
  - _refreshMediaDevices: function() {
  + _refreshMediaDevices: function(stream) {
  + if (stream) {
  + // kill stream so that we don't leave it lingering around with webcam enabled etc
  + stream.getTracks().forEach((track) => track.stop());
  + }
  +
  Promise.resolve().then(() => {
  return CallMediaHandler.getDevices();
  }).then((mediaDevices) => {
  