highlight is hard to see on tree node when the tree doesn't have the focus

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Choose a page to examine
2. click on the page so the focus is no longer on the tree

What is the expected output? What do you see instead?
the highlight on the tree node is a very, very pale grey almost 
indistinguishable from the white background of the tree.

I'd like to see a more visible highlight, perhaps a light blue (#bfffff) or a 
bit darker gray (#cccccc?)

What version are you using? On what operating system?
keynote version 1793 beta
windows xp sp3

Please provide any additional information below.

Original issue reported on code.google.com by jim.iro...@gmail.com on 17 Sep 2011 at 6:39