Problems with assigning of classes when isTree is true

[phena109]

So I need to dynamically insert child nodes to the structure and I am using the isTree setting and it is 'true'. While correct classes are assigned when first initialise and as I started a drag, but it is not doing so when I have inserted the code using DOM manipulation. For example, a leaf node added with a child node will not into a branch and vise versa.

For now I can patch up the missing classes behavior by writing my own check function but that's too patchy. Hope this can be fixed it in the close future.