[8u60] RFR: RT-38860: Mac system menu bar handles some accelerators incorrectly

[Morris Meyer]

Kevin and David,

Could I get a review for this fix for Mac menu acceleration?  The fix is 
to look for lowercase accelerators before handing them off for special 
casing.

Thanks much,

        --morris

WEBREV - http://cr.openjdk.java.net/~morris/RT-38860.01a
JIRA - https://javafx-jira.kenai.com/browse/RT-38860