anchor.diff:    <thead>
      <tr class="related-issues-footer">
       <th align="left"><%= l(:label_total) %></th>
  -    <th></th>
  +    <%- if nb_of_issues_with_category > 0 %>
  +      <th></th>
  +    <%- end %>
       <%- if User.current.allowed_to?(:view_issue_estimated_hours, @project) -%>
         <th align="center"><%= ("%.2f" % version.estimated_hours) %></th>
       <%- end -%>
  
positive.code:             end
            end
          end -%>
      <th width="14%" align="left"><%= l(:field_category) %></th>
      <th width="#{width}%" align="left"><%= l(:field_issue) %></th>
      <%- if User.current.allowed_to?(:view_issue_estimated_hours, @project) -%>
        <th width="9%" align="center"><%= l(:field_estimated_hours) %></th>
  
negative.code:         end -%>
      <tr class="hascontextmenu <%= cycle("odd", "even") %>">
        <%- tab = ("&nbsp;" * 3 * issue.parents_count).html_safe -%>
        <% if nb_of_issues_with_category > 0 %>
          <td style="text-align: left;"><%= issue.category %></td>
        <% end %>
        <td class="checkbox" align="left"><%= check_box_tag("ids[]", issue.id) %></td>
        <td align="left" style="text-align: left;">
          <div class="advanced-roadmap tooltip">
  