Methods that can duplicate a node ought to return a query containing all the clones

[jasononeil]

This happens in both DOMManipulation classes.

It causes weirdness when you do something like this:

li.setText('first");
lists.prepend(li);
li.setText("second");

If there are multiple "lists", then "li" will be cloned so it can be appended to each one. Because we only return the original though, li.setText('second') is going to have no effect on the second, third etc cloned nodes.

[jasononeil]

If these methods always return a query, containing the full collection of what we started with PLUS the clones, that would be more sensible.