ScrollPane.content moves with arrow keys

[Werner Lehmann]

Hi,

we came across a curious behavior of ScrollPane in 8u5: the scrollpane 
content can be moved around with arrow keys if it is smaller than the 
viewport. This can be reproduced in SceneBuilder with simple FXML:

> <?xml version="1.0" encoding="UTF-8"?>
>
> <?import java.lang.*?>
> <?import javafx.scene.control.*?>
>
>
> <ScrollPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="517.0" prefWidth="272.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
>    <content>
>       <CheckBox mnemonicParsing="false" style="-fx-background-color: red;" text="CheckBox" />
>    </content>
> </ScrollPane>

Just a scrollpane with a checkbox in it. It looks like a bug to me but 
maybe I am missing something?

Werner