git: openjdk/jfx11u: master: 8216377: JavaFX: memoryleak for initial nodes of Window

[Johan Vos]

Changeset: 8af39d66
Author:    Johan Vos <jvos at openjdk.org>
Date:      2021-06-09 08:08:44 +0000
URL:       https://git.openjdk.java.net/jfx11u/commit/8af39d66924ec1a958894c2b10ee50285f21e251

8216377: JavaFX: memoryleak for initial nodes of Window
8207837: Indeterminate ProgressBar does not animate if content is added after scene is set on window

Add or remove the windowShowingChangedListener when the scene changes

Backport-of: e21606d3a1b73cd4b44383babc750a4b4721edfd

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