message: refactor(panel): close standalone panel when clicking close button
  Closes
diff: @@ -58,7 +58,11 @@ const mapDispatchToProps = (
  dispatch({ type: 'TOGGLE_PIN' })
  },
  onClose: () => {
  + if (isStandalonePage()) {
  + window.close()
  + } else {
  dispatch({ type: 'CLOSE_PANEL' })
  + }
  },
  onHeightChanged: (height: number) => {
  dispatch({
  