title: Add custom action button - ng2-smart-table
body: <p>I'm trying to add a button to custom action, but a new column is not added in the action, making the button overlap with the others.</p>
  
  <p>Code:</p>
  
  <pre><code>settings = {
      actions: {
        custom: [
          {
            name: 'Button',
            title: 'Button ',
          }
        ],
      },
      columns: {
        name: {
          title: 'Full name'
        },
        email: {
          title: 'Email'
        },
        lastLogin: {
          title: 'Last Login'
        }
      }
    };
  </code></pre>
  
  <p>I needed to put a link to the image, because I have little reputation here and the image tool is blocked for me.</p>
  
  <p><a href="https://ibb.co/eoU0L9" rel="noreferrer">reaction image:</a></p>
  
  <p>What am I doing wrong?</p>