Selected Tree Node have selection border unlike Native Mercury Tree node
 
Steps to reproduce:
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1)Run SwingSet2, with the gtktheme file as the vm argument.
2)Change the look and feel to GTK.
3) Go to Tree Demo.
4) Select any node and Notice that the selected node has the selection border.
5) The traversal continues till the last node of the tree.
6) Now Open Configuration Editor on Mercury OS and repeat step 4. The selected node does not have the Selection border.
This was tested against Tiger b29 and on Mercury build10