title: Set defaultCursor in fabric.js more than once
body: <p>I can set <code>canvas.defaultCursor</code>, but I can't change it to something else once it's already set. Is this possible?</p>
  
  <p>Here's my code:</p>
  
  <pre><code>var canvas = new fabric.Canvas('c');
  
  function setCursor(cursorType) {
      if (cursorType == 'move') {
          canvas.defaultCursor = 'move';
      } else if (cursorType == 'crosshair') {
          console.log('Changing cursor to crosshair'); // this works
          canvas.defaultCursor = 'crosshair'; // this doesn't work
      }
  }
  
  setCursor('move'); // this works
  
  // ...
  
  setCursor('crosshair');
  </code></pre>