Bugfixes related to setting of cursor on parent nodes

[neilb]

Hi Wes,

Three fixes related to setting the cursor on nodes:

[1]

When opening/closing a parent node, it was calling addClass(), but it also needs to removeClass() otherwise you ended up with both contracted and expanded classes on a node.

[2] the click handler now doesn't get installed on nodes that don't have any children.

[3] set the contracted class on nodes which have their initial state set with

and set the cursor correctly too.

Neil

[wesnolte]

Thanks again Neil.