anchor.diff:        <th>Image</th>
         <%= sortable_table_header :name => "Title",  :sort => "title" %>
         <td>Status</td>
  +      <%= sortable_table_header :name => "Created At",  :sort => "created_at" %>
  +      <%= sortable_table_header :name => "Updated At",  :sort => "updated_at" %>
         <%= sortable_table_header :name => "Published At",  :sort => "published_at" %>
         <%= sortable_table_header :name => "Published To",  :sort => "published_to" %>
         <th>Actions</th>
  
positive.code:       <td><%= image_tag slide.public_filename, :width => 100 unless slide.filename == 'no_file' %></td>
        <td><%=h slide.title %></td>
        <td><%= content_status(slide) %></td>
        <td><%=h slide.published_at.strftime('%d %b') unless slide.published_at.blank? %></td>
        <td><%=h slide.published_to.strftime('%d %b') unless slide.published_to.blank? %></td>
        <td>
  
negative.code:       <th>Image</th>
        <%= sortable_table_header :name => "Title",  :sort => "title" %>
        <td>Status</td>
        <%= sortable_table_header :name => "Created At",  :sort => "created_at" %>
        <%= sortable_table_header :name => "Updated At",  :sort => "updated_at" %>
        <%= sortable_table_header :name => "Published At",  :sort => "published_at" %>
        <%= sortable_table_header :name => "Published To",  :sort => "published_to" %>
        <th>Actions</th>
  