fix: Be a little clearer when feedback is closed (or not yet open).

ietf/templates/nomcom/feedback.html

@@ -9,13 +9,20 @@
     <p id="instructions" class="alert alert-info my-3">
         {% if nomcom.group.state_id == 'conclude' %}
             Feedback to this NomCom is closed.
+        {% elif positions|length != 0 and topics|length != 0 %}
+            Select a nominee or topic from the list on the right to obtain a new feedback form.
+        {% elif positions|length != 0 %}
+            Select a nominee from the list on the right to obtain a new feedback form.
+        {% elif topics|length != 0 %}
+            Select a topic from the list on the right to obtain a new feedback form.
         {% else %}
-            Select a nominee from the list of nominees on the right to obtain a new feedback form.
+            This NomCom is not accepting feedback at this time.
         {% endif %}
     </p>
     {% if nomcom|has_publickey %}
         <div class="row">
             <div id="nominees" class="col-sm-2 order-last">
+                {% if positions|length != 0 %}
                 <h2 class="navskip mt-4">Nominees</h2>
                 <p>
                     A number after a name indicates
@@ -43,6 +50,8 @@ <h3 class="navskip mt-3">{{ p.name }}</h3>
                         </div>
                     {% endif %}
                 {% endfor %}
+                {% endif %}
+                {% if topics|length != 0 %}
                 <h2 class="navskip mt-4">Topics</h2>
                 <div class="d-grid gap-3">
                     {% for t in topics %}
@@ -58,6 +67,7 @@ <h2 class="navskip mt-4">Topics</h2>
                         </a>
                     {% endfor %}
                 </div>
+                {% endif %}
             </div>
             <div class="col-sm-10">
                 {% if form %}