DlgTrackInfo - add button to open track in file browser

Damn. You can still use the while construct to avoid the break if you like.

```C
while(!QDir(splittedPath.join("/").exists() && splittedPath.size() > 1) {
    splittedPath.removeLast();
}
```

I usually prefer writing it like this instead of using `break` because I can see in the loop-statement when the loop will be terminated.