 <label class="col-form-label col-sm-3">
      <wicket:message key="kb.settings.defineRootConcepts"/>
    </label>
    <div class="col-sm-9">
      <div class="list-group">
        <div class="list-group-item">
          <div class="input-group">
            <input type="text" wicket:id="newConceptField" class="form-control"/>
            <button wicket:id="newExplicitConcept" class="btn btn-primary">
              <i class="fas fa-plus" aria-hidden="true"/>
            </button>
          </div>
        </