Add text to notify user that RO bundle is being generated

Author: Mark Robinson

src/main/resources/templates/workflow.html

@@ -105,6 +105,7 @@ <h2>Workflow: <span th:text="${workflow.label}">Workflow Name</span></h2>
                     <img id="githubLogo" src="../static/img/GitHub-Mark-32px.png" th:src="@{/img/GitHub-Mark-32px.png}" width="24" height="24" />
                 </a>
                 <i>Fetched <span th:text="${{workflow.retrievedOn}}">01/12/16 at 21:00</span></i>
+                <span th:if="${workflow.roBundle == null}"> - Generating download link&hellip; [<a th:href="@{'/workflows/' + ${workflow.id}}" href="#">Refresh</a>]</span>
                 <span th:if="${workflow.roBundle != null}">
                     - <a th:href="@{'/workflows/' + ${workflow.id} + '/download'}" href="#">Download as Research Object Bundle</a>
                     <a href="http://www.researchobject.org/" rel="noopener" target="_blank">[?]</a>