Add workflow dummy entry.

app/templates/base.html.j2

@@ -102,6 +102,7 @@
 
       <ul id="slide-out" class="sidenav sidenav-fixed">
         <li><a href="{{ url_for('main.index') }}"><i class="material-icons">opacity</i>Opaque</a></li>
+        <li><a href="#"><i class="material-icons">linear_scale</i>Workflow</a></li>
         <li><a href="{{ url_for('main.dashboard') }}"><i class="material-icons">dashboard</i>Dashboard</a></li>
         <li><div class="divider"></div></li>
         <li><a class="subheader">Services</a></li>