hg: openjfx/11-dev/rt: 8252811: The list of cells in a VirtualFlow is cleared every time the number of items changes

[johan at lodgon.com]

Changeset: ddd7e223e00f
Author:    jpereda
Date:      2020-09-19 19:41 +0000
URL:       https://hg.openjdk.java.net/openjfx/11-dev/rt/rev/ddd7e223e00f

8252811: The list of cells in a VirtualFlow is cleared every time the number of items changes
Reviewed-by: aghaisas, kcr

! modules/javafx.controls/src/main/java/javafx/scene/control/skin/VirtualFlow.java
! modules/javafx.controls/src/test/java/test/javafx/scene/control/skin/VirtualFlowTest.java