hg: jdk9/client/jdk: 6827800: Default button is activated even when it is invisible

[prasanta.sadhukhan at oracle.com]

Changeset: 8a8a3a1d4304
Author:    aghaisas
Date:      2016-05-26 17:01 +0530
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/8a8a3a1d4304

6827800: Default button is activated even when it is invisible
Reviewed-by: serb, rchamyal

! src/java.desktop/share/classes/javax/swing/plaf/basic/BasicRootPaneUI.java
+ test/javax/swing/plaf/basic/BasicRootPaneUI/HiddenDefaultButtonTest.java