TreeStore datachanged is not fired when data is changed

Ext version tested:

• Ext 4.2.2.11444.____ rev ____

Browser versions tested against:

• FF

DOCTYPE tested against:

• HTML 5

Description:

• Attaching a listener to a tree store for the datachanged event does not result in the handler being called when data is changed.

Steps to reproduce the problem:

• Create a tree with a tree store, attach a handler to the 'datachanged' event, edit the tree.

The result that was expected:

• The handler being called

The result that occurs instead:

• Handler isn't called, see fiddle below: