Remove excessive spacing between menu items, which appeared going from Java 8 to Java 9. See screeshots in the JIRA ticket and attached here.
The spacing appeared during the fix for JDK-8067346; it should be safe to set top/bottom margins to zero, however, like they were before. (See http://hg.openjdk.java.net/jdk10/master/annotate/be620a591379/src/java.desktop/share/classes/com/sun/java/swing/plaf/windows/WindowsLookAndFeel.java )  [ Full content available at: https://github.com/apache/incubator-netbeans/pull/876 ] This message was relayed via gitbox.apache.org for devnull@infra.apache.org