Merge branch 'fix/1091-notifications-query' into 'develop'

Notifications query fix

Closes #1091

See merge request pleroma/pleroma!1427

lib/pleroma/notification.ex

@@ -65,7 +65,7 @@ def for_user_query(user, opts) do
       |> join(:left, [n, a], tm in Pleroma.ThreadMute,
         on: tm.user_id == ^user.id and tm.context == fragment("?->>'context'", a.data)
       )
-      |> where([n, a, o, tm], is_nil(tm.id))
+      |> where([n, a, o, tm], is_nil(tm.user_id))
     end
   end