admins can update volunteers, show names

app/controllers/admin/events_controller.rb

@@ -180,7 +180,7 @@ module Admin
                                     :track_id, :state, :language, :is_highlight, :max_attendees,
                                     # Not used anymore?
                                     :proposal_additional_speakers, :user, :users_attributes,
-                                    speaker_ids: [])
+                                    speaker_ids: [], volunteer_ids: [])
     end
 
     def comment_params

app/helpers/application_helper.rb

@@ -126,7 +126,7 @@ module ApplicationHelper
   def volunteer_links(event)
     safe_join(event.volunteers.map do |volunteer|
       link_to(volunteer.name, admin_user_path(volunteer))
-    end, ',')
+    end, ', ')
   end
 
   def volunteer_selector_input(form)

app/views/admin/events/_proposal.html.haml

@@ -85,6 +85,11 @@
                   (
                   = link_to speaker.email, "mailto: #{speaker.email}"
                   )
+        %tr
+          %td
+            %b Volunteers
+          %td
+            = volunteer_links(@event)
         %tr
           %td
             %b Biographies