title: How to center only one element in a row of 2 elements in flutter
body: <p>In my layout I have two Widgets in a row, one text and the an icon. </p>
  
  <p>As shown below, assume that * refers to the icon, and using "-" to represent the row:</p>
  
  <pre><code>----------------------------
             Text          *  
  ----------------------------
  </code></pre>
  
  <p>How do I make my text centered in the entire row, and the icon to the right end ?</p>