Indents with ordered lists (ol)

Sorry, maybe I'm not explaining the problem clearly.

For example:
1) create three lines of text
2) highlight them all
3) click on the number list button

And the indent option becomes grayed-out. I've just tried it on the above demo link and exactly the same thing happens.

I'm after indenting the ordered list.

I could not indent any single item by putting a cursor on it and them clicking on indent. You cannot do this with the first item in the list, and when I did it with subsequent items it reset the ordered list number back to one again for the item.

So is there no way to do this now? It was supported in previous versions and just added extra <ul>...</ul> tags. To make it worse I have numerous documents that already use the additional ul's to indent and when you try and edit these with the current version the indent buttons are not grayed-out when you cursor to the list item. However clicking on them does nothing. I'm sure if you edit the source and wrap the list in ul's to indent it you find the same thing.

Are there no config changes I can do to switch back to using ul's instead of style="margin-left: nnpx;"?

OK, after further investigation I see why ul's should not be nested to indent lists (it's against the DTD definition).

But shouldn't indentation be done via a style within the ol/ul as per the example below:

<ol style="margin-left: 80px;">
    <li>aaa</li>
    <li>bbb</li>
    <li>ccc</li>
</ol>

I guess this is either a bug or a new feature - do I need to submit this as a ticket?

Entered as ticket #3511