<Swing Dev> right ALT key generates wrong modifiers

[Peter Quiring]

A new check for VK_RMENU is generating new modifier bits for the right
ALT key causing shortcuts to fail.

http://hg.openjdk.java.net/jdk/jdk/file/ba545e52b932/src/java.desktop/windows/native/libawt/windows/awt_Component.cpp#l2718

See bug # 8194873

https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8194873

For example:

JOptionPane.showConfirmDialog(this, "Do you wish to save file?",
"Confirm", JOptionPane.YES_NO_CANCEL_OPTION)

When you type left ALT+Y it works, but right ALT+Y does NOT work.

This is a regression added in Java9.

Please fix asap, thanks.

-- 
Peter Quiring