Multi level lists

It would be great to see a button allowing the editor to implement multi level lists in to text.

To be clear, this is what Word offers as its 3rd ‘bullet’ option after image bullets, and numbered bullets, and is for lists that appear like this:

1.
1.1
1.1.1
1.2
2.
2.1
3.
3.1

etc and so on, with each ‘level’ further indented.