Merge "If two plugins contribute the same top menu display it only once"

gerrit-gwtui/src/main/java/com/google/gerrit/client/Gerrit.java

@@ -832,6 +832,7 @@ public class Gerrit implements EntryPoint {
             addExtensionLink(bar, item);
           }
           if (existingBar == null) {
+            menuBars.put(menu.getName(), bar);
             menuLeft.add(bar, menu.getName());
           }
         }