There is no way to "double click" to edit the list items in Tree Demo in SwingSet2 demo.

Steps to reproduce:
1. Run SwingSet2.jar from demos.
2. Navigate to TreeDemo.
3. Navigate to Music Tree Item

There is no way to edit the item using the keyboard.

Expected:
It should be possible to edit the item text using a keyboard shortcut. For example, for adjacent cells, the cell with focus is by default editable by simply typing on the keyboard. For a dropdown box, editing is typically accomplished by pressing 'enter' and then navigating with the arrow keys.