title: inline-flex input element breaks to new line in IE11
body: <p>I have a few html elements next to each other in a container positioned with <code>display:inline-flex</code>.</p>
  
  <p>This works well for button elements, but as soon as I try to add an <code>input type="text"</code> element, the textbox is placed below the buttons (only in Internet Explorer 11; not sure about IE10 or below).</p>
  
  <p>It works as expected (textbox in same line as buttons) in Firefox, Chrome and even Edge.</p>
  
  <p>How can I get IE to display this correctly?</p>
  
  <p>See jsFiddle for full html and css code to illustrate the problem: <a href="https://jsfiddle.net/vm2kcwd9/1/" rel="noreferrer">https://jsfiddle.net/vm2kcwd9/1/</a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>.container {
    height: 2em;
  }
  
  .container&gt;* {
    height: 100%;
    display: inline-flex;
    vertical-align: top;
    justify-content: center;
    align-items: center;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="container"&gt;
  
    &lt;button&gt;test&lt;/button&gt;
    &lt;button&gt;test 2&lt;/button&gt;
    &lt;button&gt;test 3&lt;/button&gt;
    &lt;input type="text" value="hello" /&gt;
  
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>