[9, 8u60] Review request for RT-46170: [Mac] setMaximize stops working

[Morris Meyer]

David and Kevin,

Please review this fix for stage.setMaximize() on Mac.  We were missing 
the update to the Glass Window class that set the underlying window 
state, thus would never maximize again after the first maximize / 
de-maximize iteration.

As this is localized in the one Glass-Mac JNI method it could be a 
possible candidate for inclusion in 8u60.

Thanks much,

     --morris meyer

JIRA - https://javafx-jira.kenai.com/browse/RT-46170
WEBREV - http://cr.openjdk.java.net/~morris/RT-46170.01/