title: store.getat undefined - but store is loaded and has data
body: <p>i am calling the <code>init</code> function after the <code>initComponent</code> has finished and form is active.</p>
  
  <p>To test I set it up like this:</p>
  
  <pre><code>console.log(this.store);
  console.log(this.store.getAt(0));
  </code></pre>
  
  <p>The first one shows the store - and store has data.
  Second one returns undefined.</p>
  
  <p>Why is that so? If the first <code>console.log</code> shows the data - it should already be available also for the second one.</p>
  
  <pre><code>   init: function() {
       var rec = this.store.getAt(0);
       this.setValues(rec);
       this.id = rec.id;
     }
  </code></pre>