Cannot remove indentation by setting indent to 0

I have a simple two level tree table in which I do not want the second level to be indented. I tried to remove the indentation by setting the indent configuration to 0:

```
        $("#order_table").treeTable( {indent: 0} );
```

However, this seems to hide the expand/collapse icon and the tree cannot be expanded any more. Is there another way to do this?

Thanks.
