title: Store.reload() ->How to Query by lastParam in ExtJs4
body: <p>I have a Grid.
  Get Data Code
  Code:</p>
  
  <pre><code>var myParam = {
     typeId : 1,
     xxxx : 'xxxx' //some else 
  }
  grid.store.load(myParam);
  </code></pre>
  
  <p>When to do something such as time renovate
  Code:</p>
  
  <pre><code>grid.store.reload();
  </code></pre>
  
  <p>But this lost param.</p>
  
  <p>In ExtJs3 have a Config of LastParam . 
  How to do in Extjs4.</p>
  
  <p>thanks.</p>