[9] Review Request for 8075907: The regression-swing case failed as the rollover icons is not correctly shown with the special options"-client -Dswing.defaultlaf=javax.swing.plaf.nimbus.NimbusLookAndFeel"

[Semyon Sadetsky]

Hello,

Please review fix for JDK9:
bug: https://bugs.openjdk.java.net/browse/JDK-8075907
webrev: http://cr.openjdk.java.net/~ssadetsky/8075907/webrev.00/

The Nimbus L&F logic to choose the selected button rollover icon had a 
mistake.  The same for the selected button disabled icon.

--Semyon