Hide copy all notes link for posts without notes

#1956

app/models/post.rb

@@ -972,6 +972,10 @@ class Post < ActiveRecord::Base
       last_noted_at.to_i
     end
 
+    def has_notes?
+      last_noted_at.present?
+    end
+
     def copy_notes_to(other_post)
       return if notes.active.length == 0
 
@@ -1024,7 +1028,7 @@ class Post < ActiveRecord::Base
         "has_children" => has_children?,
         "created_at" => created_at.to_formatted_s(:db),
         "md5" => md5,
-        "has_notes" => last_noted_at.present?,
+        "has_notes" => has_notes?,
         "rating" => rating,
         "author" => uploader_name,
         "creator_id" => uploader_id,

app/views/posts/partials/show/_options.html.erb

@@ -9,7 +9,7 @@
   <% else %>
     <li><%= link_to "Add notes", "#", :id => "translate", :title => "Shortcut is N" %></li>
   <% end %>
-  <% if CurrentUser.is_builder? %>
+  <% if CurrentUser.is_builder? && post.has_notes? %>
     <li><%= link_to "Copy all notes", "#", :id => "copy-notes" %></li>
   <% end %>
   <li><%= link_to "Find similar", "http://danbooru.iqdb.org/db-search.php?url=http://#{Danbooru.config.hostname}#{post.preview_file_url}" %></li>