[9] Review Request for 8040328: JSlider has wrong preferred size with Synth LAF

[Semyon Sadetsky]

Hello,

please review fix for jdk9
webrev: 
http://cr.openjdk.java.net/~alexsch/semyon-sadetsky/8040328/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8040328

Thanks,
--Semyon