title: How to set up the max-width of $mdDialog?
body: <p>I'm a new one in css and can not to set up the max-width of my confirmation dialog properly. Here my code of calling dialog:</p>
  
  <pre><code>this.$mdDialog.show({
    content: longText,
    ok: 'OK',
    cancel: 'CANCEL'
    clickOutsideToClose: true,
  });
  </code></pre>
  
  <p>The problem is that my <code>longText</code> doesn't carry and my dialog is very stretched horizontally. 
  I tried to add <code>style.less</code> locally and determine <code>max-width</code> like this:</p>
  
  <pre><code>.md-dialog {
    max-width: 300px;
  }
  </code></pre>
  
  <p>But there is no changes.
  Could some one help me?</p>