Mobile header fixes to prevent newline, covering content

Author: Mark Robinson

src/main/resources/templates/fragments/header.html

@@ -30,10 +30,13 @@
             <a class="navbar-brand" href="/">
                 <img id="logo" src="/img/CWL-Logo-Header.png"></img>
             </a>
+            <a href="/workflows" class="button navbar-toggle">Explore</a>
+        </div>
+        <div class="collapse navbar-collapse">
+            <ul class="nav navbar-nav navbar-right">
+                <li><a href="/workflows">Explore</a></li>
+            </ul>
         </div>
-        <ul class="nav navbar-nav navbar-right">
-            <li><a href="/workflows">Explore</a></li>
-        </ul>
     </div>
 </nav>
 </body>