[10] Review request for 8181476 [macos] Stages with StageStyle.UTILITY are always on-top when initialized without an owner

[Alexander Zvegintsev]

Hello,

please review the fix

http://cr.openjdk.java.net/~azvegint/jdk/10/8181476/00/

for the issue

https://bugs.openjdk.java.net/browse/JDK-8181476

-- 
Thanks,
Alexander.