[10] Review request for 8189201: [macosx] NotSerializableException during JFrame with MenuBar serialization

[Semyon Sadetsky]

Hello,

Please review fix for JDK10:
bug: https://bugs.openjdk.java.net/browse/JDK-8189201

webrev: http://cr.openjdk.java.net/~ssadetsky/8189201/webrev.00

The root cause is that several JFrame fields contain non-serializable 
class instances. The fix marks those classes as serializable.

--Semyon