Disable Show in Groups (for optical devices)

```
-What would you like to see?

You can set Show in Groups off for folders in your hardisks, but it's 
impossible to get rid of this when exploring optical media.

I would like some way to avoid to right click and turn Show in Groups off 
everytime I explore discs and try to sort columns, etc.

```

Original issue reported on code.google.com by `muramura...@hotmail.com` on 7 Nov 2012 at 1:43
