Wrap registered / ticket info in it's own section

[drnlm]

When the profile was refactored into snippets, the 'speaker isn't registered' block didn't get a surrounding <section>, unlike the other snippets.

This leads to the warning being rendered over the bio, rather than below it, which is undesirable. (This didn't happen previously, because stuff was in a common section)

This wraps stuff in it's own section, for consistency with the other snippets and to avoid the rendering issues.

[drnlm]

git diff -w, for easier review

--- a/wafer/users/templates/wafer.users/snippets/profile_30-registered.html
+++ b/wafer/users/templates/wafer.users/snippets/profile_30-registered.html
@@ -3,6 +3,7 @@
   {% if can_edit %}
     {% if profile.pending_talks.exists or profile.accepted_talks.exists or profile.provisional_talks.e>
       {% block speaker_registered %}
+        <section class="wafer-profile-registered">
           {% if profile.is_registered %}
             <div class="alert alert-success">
               {% blocktrans trimmed %}
@@ -25,6 +26,7 @@
               {{ profile.ticket_types }}
             </p>
           {% endif %}
+        </section>
       {% endblock speaker_registered %}
     {% endif %}
   {% endif %}