message: Remove border for scroll area
  There's no clear reason why the scroll area should be highligted.
diff: @@ -247,8 +247,6 @@ void ListBox::update()
  renderer.clipRect(mRect);
  - // draw boundaries of the widget
  - renderer.drawBox(mScrollArea, NAS2D::Color{0, 0, 0, 100});
  renderer.drawBoxFilled(mScrollArea, mBackgroundColorNormal);
  // Highlight currently selected item
  