hg: openjfx/10-dev/rt: 8181476: [macos] Stages with StageStyle.UTILITY are always on-top when initialized without an owner

[alexander.zvegintsev at oracle.com]

Changeset: 2a24fe2e8740
Author:    azvegint
Date:      2017-10-06 10:47 +0530
URL:       http://hg.openjdk.java.net/openjfx/10-dev/rt/rev/2a24fe2e8740

8181476: [macos] Stages with StageStyle.UTILITY are always on-top when initialized without an owner
Reviewed-by: kcr

! modules/javafx.graphics/src/main/native-glass/mac/GlassWindow.m