title: Extjs change font size for displayfield
body: <p>I've a displayfield, and i would like to increase the font size.
  I've configured it as follow:</p>
  
  <pre><code>{
    xtype:'displayfield',
    cls:'biggertext',
    fieldLabel:'label',
    style:{
           'font-size':'32px'
          },
    labelStyle:{
                  'font-size':'32px'
               }
  }
  </code></pre>
  
  <p>but the size of the font for the label and the value field has not changed.</p>
  
  <p>I've also tried to do it via CSS:</p>
  
  <pre><code>.biggertext
  {
      font-size: 32px;
  } 
  </code></pre>
  
  <p>but I've no changes about the font size.</p>
  
  <p>What is wrong?</p>
  
  <p>Thank you all</p>