title: Can an icon be centered over text in a QMessageBox?
body: <p>I am new to Qt, and am having fun diving in by building up an application in it. I have produced the below QMessageBox as a response to the About MyGreatApp menu item, which you can see has both an icon and text.</p>
  
  <p><a href="https://i.stack.imgur.com/N5fhVm.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/N5fhVm.jpg" alt="Example About QMessageBox"></a></p>
  
  <p>Can icon and text be positioned with respect to one another? Specifically: can the icon be centered over the text?</p>
  
  <pre><code>void MainWindow::about()
  {
      QMessageBox msgAbout;
      msgAbout.setInformativeText("&lt;span style='text-align: center'&gt;&lt;p&gt;&lt;b&gt;&lt;font size = 20&gt;My Great Application&lt;/font&gt;&lt;p&gt;&lt;font size = 10&gt;Version 100.1&lt;/font&gt;&lt;p&gt;&lt;font size = 10&gt;by Me&lt;/font&gt;&lt;p&gt;Copyright © Me, 1848–2018. All rights reserved.&lt;/span&gt;&lt;span style='text-align: left'&gt;&lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.&lt;/span&gt;&lt;p&gt;");
      QPixmap pixAbout;
      pixAbout.load(":/Info.png");
      msgAbout.setIconPixmap(pixAbout);
      msgAbout.setStandardButtons(QMessageBox::Ok);
      msgAbout.setDefaultButton(QMessageBox::Ok);
      msgAbout.exec();
  }
  </code></pre>
  
  <p>macOS 10.13.3<br>
  Qt Creator 4.5 based on Qt 5.10.0 (Clang 7.0 (Apple), 64 bit)</p>