Nested sortable tree

Nested sortable tree


Hello,
I've made a sortable nested tree. I've started from the test file in
the 1.8 branch.
And now it woks pretty fine in all browsers. It needs some extra
debugging maybe. And I hope you guys can help with that. And I hope it
makes a final release soon. I used some of the 1.6b files and I
altered the ui.sortable.js file a bit in order to get it to work.
I didn't use the sortIndicator which was new I think.
looking forward to the feedback.
Kind regards,
Karel-Jan