title: How to add first option as default option in select ui?
body: <p>I am using material-ui Select for dropdown. I want to set first option as default selected when page loads. However, I am not able to find any documentation.</p>
  
  <pre><code>&lt;Select
  
    open={open}
    className={classes.select}
    onClose={this.handleClose}
    onOpen={this.handleOpen}
    value={brand}
    onChange={event =&gt; this.handleChange(event)}
    name="brand"
    inputProps={inputProps}&gt;
  
    {data.getBrands.map(brands =&gt; 
     &lt;MenuItem key={brands.id} 
              value={brands.originalId} 
              id{brands.originalId}&gt;{brands.name}
     &lt;/MenuItem&gt;)}
  
  &lt;/Select&gt;
  </code></pre>
  
  <p>I expect the dropdown to contain to first option as default value when page loads for first time.</p>