RFR[9] XS: 8067648: We can not see any radio buttons in Node Properties demo

[Morris Meyer]

David and Kevin,
Please review this comment change to Ensemble8.  I could not find any of 
the PlaygroundProperties for radio buttons in NodePropertiesApp in 8u or 
9-dev.

Thanks,

        --morris

BUG - https://bugs.openjdk.java.net/browse/JDK-8087648
WEBREV - http://cr.openjdk.java.net/~morris/JDK-8067648.01/