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/TrackDetailActivity.java

@@ -161,7 +161,6 @@ public class TrackDetailActivity extends AbstractMyTracksActivity
 
   @Override
   public void onNewIntent(Intent intent) {
-    super.onNewIntent(intent);
     setIntent(intent);
     handleIntent(intent);
   }