management bar does not look correctly when contains only a search

[marcoscv-work]

management bar can contains only a no collapsible search, example following this markup:

<nav class="management-bar management-bar-light navbar navbar-expand-md">
   <div class="container-fluid container-fluid-max-xl">
      <div class="navbar-form navbar-form-autofit">
         <div class="container-fluid container-fluid-max-xl">
            <form role="search">
               <div class="input-group">
                  <div class="input-group-item">
                     <input class="form-control input-group-inset input-group-inset-after" placeholder="Search for..." type="text">
                     <span class="input-group-inset-item input-group-inset-item-after">
                        <button class="btn btn-unstyled" type="button">
                           <svg aria-hidden="true" class="lexicon-icon lexicon-icon-search"></svg>
                        </button>
                     </span>
                  </div>
               </div>
            </form>
         </div>
      </div>
   </div>
</nav>