source list item do not honor droplocation

[GoogleCodeExporter]

What steps will reproduce the problem?

1. Use a source list as drop destination
2. Set DropMode to ON
3. Drag something onto a source list item

What is the expected output? What do you see instead?

If the source list item is not selected and a drop is possible, it should have 
a round border (like in iTunes or Mail.app)
If the source list item is selected or a drop is not possible, nothing should 
change.

What version of the product are you using? On what operating system?

0.9.5 on OS X

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 25 May 2011 at 3:09