title: How to add items from multiple QStringLists to one?
body: <p>If I have several <strong>QStringLists</strong>, for example:</p>
  
  <pre><code>QStringList str1 = {"name1", "name2", "name3"};
  QStringList str2 = {"value1", "value2", "value3"};
  QStringList str3 = {"add1", "add2", "add3"};
  </code></pre>
  
  <p>Is there any way to get list of lists (nested list) like <code>QStringList listAll;</code> that will look like this:</p>
  
  <pre><code>(("name1","value1","add1"),("name2","value2","add2"),("name3","value3","add3"))
  </code></pre>