anchor.diff:  
             <div class="block region">
               <h3>Regions</h3>
  -            <select name="regions_ids[]" multiple placeholder="All regions">
  +            <select name="geolocations[]" multiple placeholder="All regions">
                 <% @regions.each do |region| %>
                   <option value="<%= region.id %>"><%= region.name %>, <%= region.country_name %></option>
                 <% end %>
  
positive.code: 
            <div class="block donor">
              <h3>Donor</h3>
              <select name="donors_ids[]" multiple placeholder="All donors">
                <% @donors.each do |donor| %>
                  <option value="<%= donor.id %>"><%= donor.name %></option>
                <% end %>
  
negative.code:             </select>
            </div>
  
  
            <div class="block sectors">
              <h3>Sectors</h3>
              <select name="sectors[]" multiple placeholder="All sectors">
                <% @sectors.each do |sector| %>
                  <option value="<%= sector.id %>"><%= sector.title %></option>
                <% end %>
                <% @filtered_sectors.each do |sector| %>
                  <option selected value="<%= sector.id %>"><%= sector.title %></option>
                <% end %>
              </select>
            </div>
  
            <div class="block organization">
              <h3>Organization</h3>
              <select name="organizations[]" multiple placeholder="All organizations">
                <% @organizations.each do |organization| %>
                  <option value="<%= organization.id %>"><%= organization.title %></option>
                <% end %>
  