RFR: JDK-8207774: TextField must not forward ENTER if action consumed

[Jeanette Winzenburg]

Please review the fix for bug:

JBS: https://bugs.openjdk.java.net/browse/JDK-8207774
openjfx: https://github.com/javafxports/openjdk-jfx/pull/575

Thanks,
Jeanette