[8u] Review request: RT-37033, CSS warnings (related to MenuItem)

[David Grieve]

Hi Martin,

Please review
Webrev: http://cr.openjdk.java.net/~dgrieve/RT-33073/webrev.00/
JIRA: https://javafx-jira.kenai.com/browse/RT-33073

Details are in JIRA. Please note that the webrev has diffs for 
cssref.html that are not related to this change but are there because of 
a changeset I haven't pushed yet.

Thanks,
-David