Tree Grid - Issue with saving child changes when parent node is collapsed

[riteshkapse]

Hi,

There is issue with saving child changes when parent is collapsed.

Try changing "First Name" like below:

1. Expand any parent
2. Change "First Name" in any child node
3. Collapse parent
4. Click "Save" button

You will see error in console.

Try it here:
http://jsfiddle.net/nzu0sh4y/