Feature request: unfold multiple directories when only one directory

When you have a `/longer/path/with/multiple/subdirectories` and each directory only contains one directory. It would be great if in "show filesystem" when clicking on an arrow icon it would unfold the entire tree until the "one directory" condition is no longer true.

Better yet ... do like github and compact multiple directories in one level. So instead of

```
> level1
> level2
> level3
> file1
> file2
```

you would get
```
> level1/level2/level3
> file1
> file2
```