detect bubble tl and add to features panel probably

lib/pleroma/web/mastodon_api/views/instance_view.ex

@@ -67,6 +67,9 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do
       "multifetch",
       "pleroma:api/v1/notifications:include_types_filter",
 	  "quote_posting",
+      if Config.get([:instance, :local_bubble]) do
+        "bubble_timeline"
+      end,
       "editing",
       if Config.get([:media_proxy, :enabled]) do
         "media_proxy"