Show SpeakerProposal email.

src/backoffice/templates/manage_proposals.html

@@ -25,6 +25,7 @@
       <thead>
       <tr>
           <th>Name</th>
+          <th>Email</th>
           <th class="text-center">Ticket?</th>
           <th class="text-center">Speaker?</th>
           <th>Submitting User</th>
@@ -35,6 +36,7 @@
       {% for proposal in speakerproposals %}
       <tr>
           <td>{{ proposal.name }}</td>
+          <td>{{ proposal.user.email }}</td>
           <td class="text-center">{{ proposal.needs_oneday_ticket|truefalseicon }}</td>
           <td class="text-center">{{ proposal.event|truefalseicon }}</td>
           <td>{{ proposal.user }}</td>