hg: openjfx/jfx-dev/rt: 8185854: NPE on non-editable ComboBox in TabPane with custom Skin

[ajit.ghaisas at oracle.com]

Changeset: f7643f961ac6
Author:    aghaisas
Date:      2018-04-13 16:09 +0530
URL:       http://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/f7643f961ac6

8185854: NPE on non-editable ComboBox in TabPane with custom Skin
Reviewed-by: kcr, arapte

! modules/javafx.controls/src/main/java/javafx/scene/control/skin/ComboBoxListViewSkin.java
+ modules/javafx.controls/src/test/java/test/com/sun/javafx/scene/control/customSkins/JDK8185854/ComboBoxCustomSkin.java
+ modules/javafx.controls/src/test/java/test/com/sun/javafx/scene/control/customSkins/JDK8185854/TabPaneCustomSkin.java
! modules/javafx.controls/src/test/java/test/javafx/scene/control/ComboBoxTest.java
+ modules/javafx.controls/src/test/resources/test/javafx/scene/control/JDK_8185854.css