Moved code to HitAreasGenerator
Changed variable name to is_already_folder_node
Added "deselected_node" attribute (that includes deselected node before selecting current node) into "event" object of "tree.select" event.
Merge pull request #203 from tedtoer/master

Adding "deselected_node" attribute to "event" object of "tree.select" event
Merge branch 'master' into dev