Tree transition end has flawed logic

[zernyu]

tree.js:100-103

if(height){
    // after expansion, ensure display is correct, and we set it to none for hidden containers to improve performance
    this.style.display = height == "0px" ? "none" : "block";
}

If the grid is being rendered while styled as "display: none", the height will be 0px. I'm trying to render the grid as a tree in a hidden node and expand all the tree nodes programmatically, and this is causing the child nodes to be styled with "display: none".

[ghost]

This should be resolved primarily by commit 5e518e1.