Create sublist should not clone styles from parent

[Garry Yao]

1. Load the following HTML:

 <ul style="margin-left: 40px;">
	<li>A</li>
	<li>B</li>
	<li>C</li>
 </ul>

2. Put the caret in the "B" item.
3. Click the "Increase Indent" button.

Expected Results: the "B" item becomes e sub-list of "A".

Actual Results: the "B" item becomes a sub-list of "A", but it also takes it's margin-left style, which should happen only in a second click.

[Garry Yao]

Fixed with [5305].