Tree: test_Tree_Notification_API_Support.html points to strange parent node in "add new item" section

[bill]

See ​http://download.dojotoolkit.org/release-1.1.0/dojo-release-1.1.0/dijit/tests/test_Tree_Notification_API_Support.html

Select "node 1". In the "New Item" section it says Parent: node 1.2. Should be the selected node.

Then select root. In the "New Item" section it says Parent: node 5. Should be the selected node.

Noticed this while testing fix for #6899.

[bill]

(In [13918]) Fixes #6910: parent field in "New Item" section wasn't getting updated correctly (in tree test file)

[bill]

(In [13919]) More test file problems:

1. fix problem w/duplicate items appearing in "potential children" list in "New Item" form.
2. add autocomplete=off to input fields
3. "Data in Flat Form" table problems:
   • name shows up as "10"
   • weird FF2 problem w/"Data In Flat Form" table where all but last child are effectively visibility:hidden (although firebug says they are visible)

Refs #6910.