title: HandsOnTable cell value changes when renderer is used
body: <p>When I use a function to change the background of a HandsOnTable cell, the value rendered in the cell changes to 1 decimal place. I thought this was because I was inadvertently removing the format string, but that appears to be incorrect.</p>
  
  <p>This is the renderer, cell function and column definition:</p>
  
  <pre><code>function negativeValueRenderer(instance, td, row, col, prop, value, cellProperties) {
      Handsontable.renderers.TextRenderer.apply(this, arguments);
  
      if (value !== instance.getData()[row][2])
          td.style.background = 'yellow';
  }
  Handsontable.renderers.registerRenderer('negativeValueRenderer', negativeValueRenderer);
  
  function cells(row, col, prop) {
      if (col === 1)
          return { format: '0.00', renderer: negativeValueRenderer }
      else
          return { format: '0.00', }
  }
  
  var colDefs = [
      {
          dateFormat: 'DD/MM/YYYY HH:mm',
          correctFormat: true,
          width: 150,
          editor: false,
          disableVisualSelection: true,
          readOnly: true,
      }, {
          type: 'numeric',
          format: '0.00',
          width: 75
      }, {
          type: 'numeric',
          format: '0.00',
          width: 75,
          editor: false,
          readOnly: true,
      }
  ];
  </code></pre>
  
  <p>How can I ensure that cells which have, eg, 1254.23 retain the two decimal places - in my table the third column is rendered with 2 decimal places but the second is with only 1 place.</p>