Fix unread messages in topic

Signed-off-by: Skia <skia@libskia.so>

core/static/core/style.scss

@@ -584,7 +584,7 @@ textarea {
       font-size: 100%;
     }
     &.unread {
-      background: #d8e7f3;
+      background: $secondary-neutral-light-color;
     }
   }
 

forum/views.py

@@ -182,7 +182,7 @@ class ForumTopicDetailView(CanViewMixin, DetailView):
     def get_context_data(self, **kwargs):
         kwargs = super(ForumTopicDetailView, self).get_context_data(**kwargs)
         try:
-            msg = self.object.get_first_unread_message(user)
+            msg = self.object.get_first_unread_message(self.request.user)
             kwargs['first_unread_message_id'] = msg.id
         except:
             kwargs['first_unread_message_id'] = float("inf")