title: Expanded accordion list items to stay in flex columns
body: <p>In the demo below, there are two columns with list items and when I click on the #6 <code>li</code> in the column #2, the #5 <code>li</code> jumps to the column #1. Is there a way to make sure all 3 lists to STAY in the column #2 when clicked?</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>$(function() {
    // (Optional) Active an item if it has the class "is-active" 
    $(".accordion &gt; .accordion-item.is-active").children(".accordion-panel").slideDown();
  
    $(".accordion &gt; .accordion-item").click(function() {
      // Cancel the siblings
      $(this).siblings(".accordion-item").removeClass("is-active").children(".accordion-panel").slideUp();
      // Toggle the item
      $(this).toggleClass("is-active").children(".accordion-panel").slideToggle("ease-out");
    });
  });</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>ul {
    display: flex;
    flex-flow: wrap column;
    height: 200px; /*to change height to split ul list*/
    border: solid 1px red;
  }
  
  .accordion {
    list-style: none;
  }
  
  .accordion-thumb {
    margin: 0;
    padding: 5px;
    cursor: pointer;
    font-weight: normal;
  }
  
  .accordion-thumb::before {
    content: "";
    display: inline-block;
    height: 7px;
    width: 7px;
    -webkit-transition: -webkit-transform 0.2s ease-out;
    transition: -webkit-transform 0.2s ease-out;
    transition: transform 0.2s ease-out;
    transition: transform 0.2s ease-out, -webkit-transform 0.2s ease-out;
  }
  
  .accordion-panel {
    margin: -10px;
    display: none;
    margin-left: 12px;
    padding-bottom: 15px;
  }
  
  body {
    line-height: 1.5;
    margin: 0 auto;
    max-width: 500px;
  }</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;ul class="accordion"&gt;
    &lt;li class="accordion-item is-active"&gt;
      &lt;h3 class="accordion-thumb"&gt;1.) list one&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;1111111111
      &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;2.) list two&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;2222222222 &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;3.) list three&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;3333333333
      &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;4.) list four &lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;4444444444 &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;5.) list five&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;5555555555
      &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;6.) list six&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;6666666666 &lt;/p&gt;
    &lt;/li&gt;
  
    &lt;li class="accordion-item"&gt;
      &lt;h3 class="accordion-thumb"&gt;7.) list seven&lt;/h3&gt;
      &lt;p class="accordion-panel"&gt;7777777777
      &lt;/p&gt;
    &lt;/li&gt;
  &lt;/ul&gt;</code></pre>
  </div>
  </div>
  </p>