Can not drop into empty list.

[obodnar]

I have two nestable lists side by side and I need to drag/drop from one list to another. After small research it seems that there is no condition that sets "dd-empty" container, and I added such few lines:
if (!model.length) {
$('<div class="dd-empty"></div>').appendTo(root);
return root;
}
right after
var root = $('<div class="dd"></div>');
in buildNestableHtml function, and now empty container appears and everything works fine.

[kamilkp]

Can you make a pull request?

[obodnar]

I will, thanks.