Add live icon

app/views/lectures/_lecture.html.erb

@@ -20,6 +20,8 @@
 
       <% if lecture.attended? %>
         <i class="fa fa-chalkboard-user text-green-700"></i>
+      <% elsif lecture.live? %>
+        <i class="fa fa-video text-blue-700"></i>
       <% elsif lecture.start_time.past? %>
         <i class="fa fa-times text-red-700"></i>
       <% else %>
@@ -60,7 +62,11 @@
                     class: 'action-button'
       %>
     <% elsif lecture.start_time.past? && !lecture.attended? %>
-      <% start_label = if lecture.is_live? then "Join" else "Start" end %>
+      <% start_label = if lecture.is_live? then
+                         "Join"
+                       else
+                         "Start"
+                       end %>
       <%= button_to start_label,
                     lectures_start_path(id: lecture.id),
                     class: 'action-button'