message: keep previous >= pl limit
diff: @@ -166,7 +166,7 @@ export class RoomPermalinkCreator {
  }, [null, 0]);
  const [userId, powerLevel] = maxEntry;
  // object wasn't empty, and max entry wasn't a demotion from the default
  - if (userId !== null && powerLevel > (content.users_default || 0)) {
  + if (userId !== null && powerLevel >= 50) {
  this._highestPlUserId = userId;
  return;
  }
  