hg: openjfx/9-dev/rt: 8145565: Stage.show() blocked for several minutes

[vadim.pakhnushev at oracle.com]

Changeset: 2ca836984e7f
Author:    vadim
Date:      2016-01-16 07:46 +0300
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/2ca836984e7f

8145565: Stage.show() blocked for several minutes
Reviewed-by: kcr

! modules/controls/src/main/java/javafx/scene/control/skin/LabeledSkinBase.java
! modules/controls/src/test/java/test/javafx/scene/control/skin/ButtonSkinTest.java