Update menu after rotation on detail view

Fixes losing the 'failed' vs 'ok' upload state in the menus on rotation
in Android 2.3.

commons/src/main/java/org/wikimedia/commons/media/MediaDetailPagerFragment.java

@@ -86,6 +86,7 @@ public class MediaDetailPagerFragment extends SherlockFragment implements ViewPa
             view.postDelayed(new Runnable() {
                 public void run() {
                     pager.setCurrentItem(pageNumber, false);
+                    getSherlockActivity().supportInvalidateOptionsMenu();
                 }
             }, 100);
         }