hg: jdk/submit15: 8249251: [dark_mode ubuntu 20.04] The selected menu is not highlighted in GTKLookAndFeel

[pankaj.b.bansal at oracle.com]

Changeset: fee61d4c5e7e
Author:    pbansal
Date:      2020-07-15 23:40 +0530
URL:       https://hg.openjdk.java.net/jdk/submit15/rev/fee61d4c5e7e

8249251: [dark_mode ubuntu 20.04] The selected menu is not highlighted in GTKLookAndFeel
Reviewed-by: serb, prr

! src/java.desktop/share/classes/com/sun/java/swing/plaf/gtk/GTKPainter.java
+ test/jdk/javax/swing/JMenu/JMenuSelectedColorTest.java