[8] Review request for 7124321: [macosx] TrayIcon MouseListener is never triggered

[Leonid Romanov]

Hi,
This is a forward port for an old JDK 7 fix which for some reasons hasn't made 
into JDK 8. 

Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7124321
Webrev: http://cr.openjdk.java.net/~leonidr/7124321/webrev.02/

Thanks,
Leonid.