title: If I add an item to QTreeWidget it always gets inserted in first row
body: <p>I want the new items to be inserted after the last row instead of first row. </p>
  
  <pre><code>for(i=0;i&lt;10;i++)
  {
      QTreeWidgetItem* tempItem = new QTreeWidgetItem();
      tempItem-&gt;setText(0,QString::number(i));
      ui-&gt;treeWidget-&gt;insertTopLevelItem(tempItem,i);
  }
  </code></pre>
  
  <p>It inserts the items at top, not at the bottom.</p>