message: Use Color::alphaFade in ListBox::update()
diff: @@ -301,7 +301,7 @@ void ListBox::update()
  auto itemBounds = listBounds;
  itemBounds.height = mLineHeight;
  itemBounds.y += static_cast<int>((mCurrentSelection * mLineHeight) - mCurrentOffset);
  - renderer.drawBoxFilled(itemBounds, mHighlightBg.red, mHighlightBg.green, mHighlightBg.blue, 80);
  + renderer.drawBoxFilled(itemBounds, mHighlightBg.alphaFade(80));
  // Highlight On mouse Over
  if (mCurrentHighlight != constants::NO_SELECTION)
  