Streamer: Fix wrong argument order when rendering activities to authenticated user

Closes #1747

lib/pleroma/web/mastodon_api/websocket_handler.ex

@@ -78,7 +78,7 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     user = %User{} = User.get_cached_by_ap_id(state.user.ap_id)
 
     unless Streamer.filtered_by_user?(user, item) do
-      websocket_info({:text, view.render(template, user, item)}, %{state | user: user})
+      websocket_info({:text, view.render(template, item, user)}, %{state | user: user})
     else
       {:ok, state}
     end

lib/pleroma/web/views/streamer_view.ex

@@ -25,7 +25,7 @@ defmodule Pleroma.Web.StreamerView do
     |> Jason.encode!()
   end
 
-  def render("notification.json", %User{} = user, %Notification{} = notify) do
+  def render("notification.json", %Notification{} = notify, %User{} = user) do
     %{
       event: "notification",
       payload: