fix hide olh link if empty
<li><a
href="${contextPath}/admin/scheduler/details/4/default_crawler"><i
class="fa fa-play-circle"></i></a></li>
+ <c:if test="${not empty helpLink}">
<li><a href="${helpLink}" target="_olh"><i
class="fa fa-question-circle"></i></a></li>
+ </c:if>
<li><a href="${contextPath}/logout"><i
class="fa fa-sign-out"></i></a></li>
</ul>
