hg: openjfx/jfx-dev/rt: 8216377: Fix memoryleak for initial nodes of Window; ...

[kevin.rushforth at oracle.com]

Changeset: eedba0ab9a0b
Author:    kcr
Date:      2019-01-22 09:08 -0800
URL:       http://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/eedba0ab9a0b

8216377: Fix memoryleak for initial nodes of Window
8207837: Indeterminate ProgressBar does not animate if content is added after scene is set on window
Summary: Add or remove the windowShowingChangedListener when the scene changes
Reviewed-by: arapte, kcr
Contributed-by: fk at sandec.de

! modules/javafx.graphics/src/main/java/javafx/scene/Node.java
+ tests/system/src/test/java/test/javafx/scene/InitialNodesMemoryLeakTest.java