title: How can I center vertically a bootstrap class button?
body: <p>I need to get a button inside a <code>form-actions</code> vertically:</p>
  
  <p>This is how is displayed:</p>
  
  <p><img src="https://i.stack.imgur.com/VdKjZ.png" alt="enter image description here"></p>
  
  <p>So that green button is being displayed down to its div (the blue area). How can I get to center it. I use a <code>style.css</code> file where I've styled some other divs.</p>