List Item Indentation

Is there a way for indentation to be
```md
- Item1
  - SubItem1
- Item2
  - SubItem2
     - SubItem2.1
```

To be
```md
- Item1
  - SubItem1
- Item2
  - SubItem2
     - SubItem2.1
```

Instead of
```md
  - Item1
    - SubItem1
  - Item2
    - SubItem2
       - SubItem2.1
```