title: How to select default option in Material-UI Autocomplete component dynamically?
body: <p>I am looking for a way to pre-set a default option in a Autocomplete component, just when the ajax call completes loading the list of options. 
  So the use case would be this: when the user opens the page, in the background a list of options would be loaded into state from the ajax response. I want to select the first retrieved option from the list, as soon as it gets loaded. Currently, I just have a basic way to offer a list of options:</p>
  
  <pre><code>  &lt;Autocomplete
       options={defaultProps.options}
       getOptionLabel={option =&gt; option.name}
                   renderInput={params =&gt; (
                    &lt;TextField {...params} variant="outlined" fullWidth /&gt;
       )}
    /&gt;
  </code></pre>
  
  <p>but don't know to select the first one when it gets loaded. </p>