message: Rename `_rect` to `listBoxRect`
diff: @@ -72,8 +72,8 @@ void FileIo::onDoubleClick(EventHandler::MouseButton /*button*/, int x, int y)
  {
  if (!visible()) { return; } // ignore key presses when hidden.
  - const Rectangle_2d& _rect = mListBox.rect();
  - if (_rect.contains(NAS2D::Point{x, y}))
  + const Rectangle_2d& listBoxRect = mListBox.rect();
  + if (listBoxRect.contains(NAS2D::Point{x, y}))
  {
  if (mListBox.currentHighlight() != constants::NO_SELECTION && !txtFileName.empty())
  {
  