message: Use static_cast to silence conversion warning in ListBoxBase
  We should probably consider using `int` for those values.
diff: @@ -80,8 +80,8 @@ protected:
  void _update_item_display();
  - unsigned int item_width() const { return mItemWidth; }
  - unsigned int item_height() const { return mItemHeight; }
  + unsigned int item_width() const { return static_cast<unsigned int>(mItemWidth); }
  + unsigned int item_height() const { return static_cast<unsigned int>(mItemHeight); }
  void item_height(int);
  unsigned int draw_offset() const { return mCurrentOffset; }
  