Hide show ticket submission UI for logged-out user

Fixes #79

todosrht/templates/tracker.html

@@ -16,6 +16,7 @@
   <div class="row">
     <div class="col-md-4">
       {{ tracker.description | md }}
+      {% if current_user %}
       <h3 style="margin-top: 1rem">Submit ticket</h3>
       <form method="POST" action="{{
           url_for(".tracker_submit_POST",
@@ -61,6 +62,10 @@
             {% endif %}> Submit another?
         </label>
       </form>
+      {% else %}
+      <hr />
+      <p>You need to <a href="{{ oauth_url }}">log in</a> to submit tickets.</p>
+      {% endif %}
     </div>
     <div class="col-md-8">
       <form>