title: Remove gap between rows in GWT Grid
body: <p>I've got a GWT Grid filled with Image widgets:</p>
  
  <pre><code>private Grid puzzleTable = new Grid(4, 2);
  [...]
  for ( y = 0; y &lt; 3; ++y ) {
    for ( x=0; x &lt; 2; ++x ) {
      Image img = new Image( DEFAULT_IMAGE_DIR+"/portrait"+"_"+y+"_"+x+".png" );
      puzzleTable.setWidget( y, x, img );
    }
  }
  </code></pre>
  
  <p>Then I want to remove all the spacing/padding of the table cells:</p>
  
  <pre><code>puzzleTable.setCellPadding(0);
  puzzleTable.setCellSpacing(0);
  </code></pre>
  
  <p>However, there remains a gap between the rows. The gap seems to be some spacing for the bottom of the cell. I already tried to apply different CSS settings to the table, rows and cells but nothing helped. Any ideas?</p>