When JList gains focus through the tab key it does not select the the list item.


Steps to Reproduce:
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1) Run SwingSet2 on Mercury with -Dswing.gtkthemefile=<Your .gtkrc File>. Change the Look And Feel to GTK.
2) Go to FileChooser Demo.
3) Click on button 'Show Plain JFileChooser' and now tab to Folder list so that it have focus,and notice that it does not show that the first item is selected and does not have the selected color.
4) Now open Gedit.
5) Click Open and now tab to Folder List so that it have focus, notice that the first item is selected and have the selected color. It is different than java implementation of the same.