anchor.diff:          <%= select_tag  :author,
                           options_for_select(admin_author_filter_options(current_user), @filter.options[:author]),
                           class: 'chzn-select' %>
  -        <%= pass_through_filter_options_as_hidden_fields(@filter, :type, :state, :world_location, :from_date, :to_date) %>
  +        <%= pass_through_filter_options_as_hidden_fields(@filter, :title, :type, :state, :world_location, :from_date, :to_date) %>
           <%= submit_tag "Go", class: "btn js-hidden" %>
         <% end %>
       <% end %>
  
positive.code:         <%= select_tag :state,
                          options_for_select(admin_state_filter_options, @filter.options[:state]),
                          class: 'chzn-select-no-search' %>
            <%= pass_through_filter_options_as_hidden_fields(@filter, :organisation, :world_location_ids, :type, :author, :from_date, :to_date) %>
            <%= submit_tag "Go", class: "btn js-hidden" %>
        <% end %>
      </div>
  
negative.code:           <%= text_field_tag :to_date, @filter.options[:to_date], class: 'date', placeholder: "e.g. 23/08/2013" %>
            <%= submit_tag "enter", class: "btn-enter js-btn-enter js-hidden" %>
          </div>
          <%= pass_through_filter_options_as_hidden_fields(@filter, :title, :organisation, :world_location_ids, :state, :author, :type) %>
          <%= submit_tag "Go", class: "btn js-hidden" %>
        <% end %>
      </div>
  