Maybe it’s just me, but the way Nuendo displays an open folder track makes it appear that it belongs to the folder track above it:
To me, it looks like “Programs” is contained in “FC1”. The indentation makes it appear like they’re child and parent and it confuses me to no end when I’m trying to visually navigate a project with lots of mixed open and closed folders. The M and S buttons for top-level folder tracks ought to be lined up to my way of thinking. Indent the children, not the parent.
Would it be possible to just draw the open folder icon but leave it in place without the indentation?