add navigation to menu again

    Bug: 5021497
    re-enabled the navigation menu items
    adjust state based on current tab

Change-Id: If396829f280fdb7831ade97180c38342e4f483a3
diff --git a/src/com/android/browser/NavScreen.java b/src/com/android/browser/NavScreen.java
index 6a51e87..d03da6b 100644
--- a/src/com/android/browser/NavScreen.java
+++ b/src/com/android/browser/NavScreen.java
@@ -77,7 +77,7 @@
         PopupMenu popup = new PopupMenu(mContext, mMore);
         Menu menu = popup.getMenu();
         popup.getMenuInflater().inflate(R.menu.browser, menu);
-        menu.setGroupVisible(R.id.NAV_MENU, false);
+        mUiController.updateMenuState(mScroller.getSelectedItem(), menu);
         popup.setOnMenuItemClickListener(this);
         popup.show();
     }