title: centering search box in semantic ui
body: <p>i am trying to center a search box in semantic ui. the bar is centered but the search results are not getting centered.i tried puuting <strong>center aligned</strong> classes to the input the divs but it didnt work
  here is my code and my js <a href="https://jsfiddle.net/c6r735nj/3/" rel="nofollow noreferrer">fiddle link</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-js lang-js prettyprint-override"><code>var categoryContent = [{
      category: 'Language',
      title: 'Python'
    },
    {
      category: 'Language',
      title: 'Java'
    },
  ];
  
  $('.ui.search')
    .search({
      type: 'category',
      source: categoryContent
    });</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>body {
    background-color: #F2EDF3;
  }
  
  .search-bar {
    width: 50%;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
  &lt;!DOCTYPE html&gt;
  &lt;html&gt;
  
  &lt;head&gt;
    &lt;title&gt;&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.3.3/semantic.min.css" /&gt;
    &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"&gt;&lt;/script&gt;
    &lt;script src="https://cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.3.3/semantic.min.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
    &lt;div class="ui grid center aligned"&gt;
      &lt;div class="sixteen wide column"&gt;
        &lt;div class="ui category search "&gt;
          &lt;div class="ui icon input search-bar"&gt;
            &lt;input class="prompt" type="text" placeholder="looking for..."&gt;
            &lt;i class="search icon"&gt;&lt;/i&gt;
          &lt;/div&gt;
          &lt;div class="results"&gt;&lt;/div&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;
  
  &lt;/body&gt;
  
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>