title: My MUI Select component doesn't display placeholder or label props
body: <p>Basically what the title says. I'm trying to use the Select component in my app but both the <code>placeholder=&quot;Text&quot;</code> and <code>label={&quot;Text&quot;}</code> props don't display the expected result.</p>
  <p>When using <code>placeholder</code> the Select is rendered as &quot;empty&quot;, while the <code>label</code> prop looks like is doing something but after clicking on it this is the result:</p>
  <p><a href="https://i.stack.imgur.com/RQY4b.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RQY4b.png" alt="select component with empty label" /></a></p>
  <p>My package.json shows</p>
  <pre class="lang-json prettyprint-override"><code>&quot;@material-ui/core&quot;: &quot;^5.0.0-alpha.27&quot;,
  &quot;@material-ui/icons&quot;: &quot;^5.0.0-alpha.27&quot;,
  &quot;@material-ui/lab&quot;: &quot;^5.0.0-alpha.27&quot;,
  &quot;@material-ui/system&quot;: &quot;^5.0.0-alpha.27&quot;,
  </code></pre>
  <pre class="lang-js prettyprint-override"><code>&lt;Select
    label={&quot;Text&quot;}
    variant=&quot;outlined&quot;
    size=&quot;small&quot;
    fullWidth
  &gt;
    &lt;MenuItem value={1}&gt;Option 1&lt;/MenuItem&gt;
    &lt;MenuItem value={2}&gt;Option 2&lt;/MenuItem&gt;
  &lt;/Select&gt;
  </code></pre>