request to backport JDK-8193445 to JavaFX 11

[Johan Vos]

Hi Kevin,

I request permission to backport the fix for
https://bugs.openjdk.java.net/browse/JDK-8193445 to the 11-dev repository (
hg.openjdk.java.net/openjfx/11-dev/rt)

The patch applies clean to the 11-dev repository.

- Johan