title: No known conversion from QList<QVariant> to QList<bool>
body: <p>I have stuck with simple problem and can not find solution.
  I want to convert <code>QList&lt;QVariant&gt;</code> to <code>QList&lt;bool&gt;</code>.</p>
  <pre><code>QList&lt;QVariant&gt; listVariants;
  listVariants &lt;&lt; QVariant(true) &lt;&lt; QVariant(false) &lt;&lt; QVariant(true);
  
  QList&lt;bool&gt; listBools;
  listBools = listVariants;
  </code></pre>
  <p>Is this possible to do it with 1 line or cast somehow from <code>QList&lt;QVariant&gt;</code> to <code>QList&lt;booL&gt;</code> or I should iterate over the <code>QList&lt;QVariant&gt;</code> and call <code>.toBool()</code> method on each element and then add it in the <code>QList&lt;bool&gt;</code>?</p>
  <p>Thanks in advance.</p>