don't display the message button, if the speaker did not claim this profile

src/plainui/jinja2/plainui/user.html

@@ -47,7 +47,7 @@
                         {{ _("Get in Touch") }}
                     </dt>
                     <dd class="grid-list__item grid-list__item--text">
-                        {% if display_user != user %}
+                        {% if display_user != user and display_user.user_type != 'speaker' %}
                             <a
                                 href="{{ url('plainui:personal_message_send_to', recipient=display_user.username) }}"
                                 class="a mr-2"