message: frontend: Default nav Link target to undefined to avoid page reloads
  Setting the target to "_self" causes the app to reload.
diff: @@ -35,7 +35,7 @@ class NavLink_ extends React.Component {
  }
  render () {
  - const {name, flags, required = null, onClick = null, target = '_self'} = this.props;
  + const {name, flags, required = null, onClick = null, target = undefined} = this.props;
  if (required && !flags[required]) {
  return null;
  }
  