Minor UI improvements.

- close contextual menu after an item is selected
- collapse the search widget after a search request is sent
- show keyboard by default for the editors
- in the search list, if edit or delete is selected in the contextual
  menu, close the search list since its content will get changed.
- enable QueryRefinement in search widget
- do not call super.onNewIntent
- update search.xml to include imeOptions, queryAfterZeroResults, and
  set searchSuggestionThreshold to 1.

MyTracks/src/com/google/android/apps/mytracks/fragments/DeleteOneTrackDialogFragment.java

@@ -57,6 +57,8 @@ public class DeleteOneTrackDialogFragment extends DialogFragment {
                 .deleteTrack(getArguments().getLong(KEY_TRACK_ID));
             Intent intent = IntentUtils.newIntent(getActivity(), TrackListActivity.class); 
             startActivity(intent);
+            // Close the activity since its content can change after delete.
+            getActivity().finish();
           }
         });
   }