horizon/horizon/templates/horizon/common/_workflow_step.html

<noscript><h3>{{ step }}</h3></noscript>
<div class="row">
  <div class="col-sm-6">
    {% include "horizon/common/_form_fields.html" %}
  </div>
  <div class="col-sm-6">
    {{ step.get_help_text }}
  </div>
</div>