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QStyle::standardPixmap is deprecated and not hi-dpi friendly. Unfortunately, there's no equivalent of QIcon::addPixmap for QIcons themselves -- so it's **impossible** in current Qt API to handle the ON/OFF icon states. Believe me... there's NOOOOOOO way. I've looked. I've tried. It's not possible. This means we have to change the logic for showing open/closed folders in browser. This commit revises the logic to show the open icon for any *populated* folders, regardless of whether they are opened or not.