title: breeze client entity not updating after server-side changes
body: <p>I have a simple breeze/knockout based SPA. I had to implement a "single save" option for a list of entities - editing was to be done on the list not in a separate popup.</p>
  
  <p>On saving the server would check that only certain attrs of the entity were updated and also update a "last updated date" attr.</p>
  
  <p>The list of entities was pulled up from the server by one Entity Manager.</p>
  
  <p>To enable the single save the updated and ready to save entity was exported from the main Entity Manager and imported into a temporary entity manager. The save is performed and (if ok) the object re-exported and imported back into the main entity manager.</p>
  
  <pre><code>function saveSingle(entity)
  {
      var tempMgr = MainEntityManager.createEmptyCopy();
      var exp = MainEntityManager.exportEntities([entity]);
      tempMgr.importEntities(exp, { 
          mergeStrategy: breeze.MergeStrategy.PreserveChanges });
      tempMgr.saveChanges()
      .then(function (saveResult) {
          var reImp = tempMgr.exportEntities();
          MainEntityManager.importEntities(reImp);
  
          entity.Last_Updated_Date(saveResult.entities[0].Last_Updated_Date());
          entity.entityAspect.entityState = breeze.EntityState.Unchanged;
  
          logger.success("changes saved");
      })
      .fail(function () {
          logger.error("Single Save failed: " + error.message);
      });
  }
  </code></pre>
  
  <p>However, it looks like the new "last updated date" value does not get copied over after the save in the re-export/import back to the MainEntityManager process. I have worked around this but I'm wondering if I've done something wrong in this implementation and whether there is a better way to construct the "single entity save" feature?</p>
  
  <p>Comments and questions welcome!</p>