openproject/app/views/hooks/_view_issues_move_bottom.rhtml

<p>
  <label><%= l(:field_cost_object) %></label>
  <%= select_tag('cost_object_id', (@target_project == @project ? content_tag('option', l(:label_no_change_option), :value => '') : "") +
                                   content_tag('option', l(:label_none), :value => 'none') +
                                   options_from_collection_for_select(@target_project.cost_objects, :id, :subject)) %>
</p>