message: simplify handled logic by inverting it
diff: @@ -82,21 +82,20 @@ var LeftPanel = React.createClass({
  _onKeyDown: function(ev) {
  if (!this.focusedElement) return;
  - let handled = false;
  + let handled = true;
  switch (ev.keyCode) {
  case KeyCode.TAB:
  this._onMoveFocus(ev.shiftKey);
  - handled = true;
  break;
  case KeyCode.UP:
  this._onMoveFocus(true);
  - handled = true;
  break;
  case KeyCode.DOWN:
  this._onMoveFocus(false);
  - handled = true;
  break;
  + default:
  + handled = false;
  }
  if (handled) {
  