title: What is the use of data-role="fieldcontain"?
body: <p>I just discovered that text inputs within a div with <code>data-role="fieldcontain"</code> don't expand to the 100%, but if you place a text input outside of a fieldcontain it expands to the fullest. This is a bug that they are fixing, but meanwhile...</p>
  
  <p>So I was wondering what is the use of that <code>data-role="fieldcontain"</code> in the first place? Why to put it? I saw it on the documents and I just put it in my html, but what is the use of putting it?</p>
  
  <p>Thanks!</p>