Support notifications for deleted users

app/views/notifications/index.html.erb

@@ -13,14 +13,14 @@
       <tr>
         <td><%= notification.to_be_sent_on %></td>
         <td><code><%= notification.template %></code></td>
-        <td><%= link_to notification.member do %><%= notification.member.display_name %> &lt;<%= notification.member.email %>&gt;<% end %></td>
         <td>
-          <% if notification.status == 'scheduled' %>
-            <%= form_with url: deliver_notification_path(notification) do |form| %>
-              <%= form.submit t('members.show.actions.deliver_notification') %>
-            <% end %>
+          <% if notification.member %>
+            <%= link_to notification.member do %><%= notification.member.display_name %> &lt;<%= notification.member.email %>&gt;<% end %>
+          <% else %>
+            ---
           <% end %>
         </td>
+        <td></td>
       </tr>
     <% end %>
   </table>