title: Leading Image overflows in ListTile
body: <p>I have a <code>ListView</code> with <code>ListTile</code>. Each <code>ListTile</code> has a <code>title</code> with <code>Text</code>, <code>subtitle</code> with <code>Text</code>, and <code>leading</code> with an <code>Image</code>.</p>
  
  <p>Now, the Image is too big and vertically stretches into the next row, overlapping the Image there.</p>
  
  <p>How can I make sure that the Image stays within the bounds?</p>
  
  <p>EDIT:</p>
  
  <p>I’d like not to give the image a fixed size, but rather let it adjust to the height of the list tile as given by title+subtitle’s intrinsic height.</p>