FIX: People could retitle restricted topics

Sort of a security fix but not really

lib/guardian/topic_guardian.rb

@@ -28,6 +28,7 @@ module TopicGuardian
   # Editing Method
   def can_edit_topic?(topic)
     return false if Discourse.static_doc_topic_ids.include?(topic.id) && !is_admin?
+    return false unless can_see?(topic)
     return true if is_staff? || (!topic.private_message? && user.has_trust_level?(TrustLevel[3]))
     return false if topic.archived
     is_my_own?(topic) && !topic.edit_time_limit_expired?