[7u] Approval request for 4199622 RFE: JComboBox shouldn't sending ActionEvents for keyboard navigation

[Vladislav Karnaukhov]

Hello,

this is a request to push the fix for 4199622 RFE: JComboBox shouldn't 
sending ActionEvents for keyboard navigation into jdk7u-dev.

The fix is identical to that in jdk8.

jdk7 webrev: http://cr.openjdk.java.net/~vkarnauk/4199622/jdk7/webrev.00/
jdk8 changeset: http://hg.openjdk.java.net/jdk8/awt/jdk/rev/caec64340f42
bug: http://bugs.sun.com/view_bug.do?bug_id=4199622
reviewed by: alexp (jdk8), alexsch (jdk7, jdk8)

Regards,
- Vlad