[9] Review request for 8052123 Horizontal scrolling not possible with touchpad with Metal and Nimbus L&F

[Alexander Scherbatiy]

Hello,

Could you review the fix:
  bug: https://bugs.openjdk.java.net/browse/JDK-8052123
  webrev: http://cr.openjdk.java.net/~alexsch/8052123/webrev.00

  The handling of WM_MOUSEHWHEEL event is added.

Thanks,
Alexandr.