<header class="site-header site-header--fixed">
  <div class="navbar container">
    <div class="logo-wrapper">
      <a class="site-logo" href="/"><%= inline_svg("logo.svg", class: "isvg") %></a>
    </div>

    <div class="navbar-right">
      <a class="site-menu-toggler" href="#">
        <%= inline_svg("menu.svg", class: "isvg isvg-menu") %>
      </a>
    </div>

    <form class="search-box" action="<%= url_for('/search/index.html') %>" novalidate>
      <div class="form-group form-group-submittable">
        <div class="has-float-label">
          <input type="email" class="form-control placeholder-shown" name="inputSearch" id="inputSearch" placeholder="Search Solidus Documentation">
          <label for="inputSearch">Search Solidus Documentation</label>
          <button type="submit" class="btn btn-link"><%= inline_svg("icons/search.svg", class: "isvg") %></button>
        </div>
      </div>
    </form>
  </div>
</header>
<header class="site-header site-header--fixed">
  <div class="navbar container">
    <div class="logo-wrapper">
      <a class="site-logo" href="/"><%= inline_svg("logo.svg", class: "isvg") %></a>
    </div>

    <div class="navbar-right">
      <a class="site-menu-toggler" href="#">
        <%= inline_svg("menu.svg", class: "isvg isvg-menu") %>
      </a>
    </div>

    <form class="search-box" action="<%= url_for('/search/index.html') %>" novalidate>
      <div class="form-group form-group-submittable">
        <div class="has-float-label">
          <input type="email" class="form-control h-auto placeholder-shown" name="inputSearch" id="inputSearch" placeholder="Search Solidus Documentation">
          <label for="inputSearch">Search Solidus Documentation</label>
          <button type="submit" class="btn btn-link"><%= inline_svg("icons/search.svg", class: "isvg") %></button>
        </div>
      </div>
    </form>
  </div>
</header>

Fix Guides search bar height
Fix Guides search bar height

In latest Twitter Bootstrap versions form-control height is
no more auto and this change is needed to make our search
bar work properly, see: twbs/bootstrap#26820
