fixes #1576

The "params[:order] ||= params.delete(:sort)" is to support existing
links using sort.

app/views/pools/_search.html.erb

@@ -38,10 +38,10 @@
       </tr>
 
       <tr>
-        <th><label for="search_sort">Order</th>
+        <th><label for="search_order">Order</th>
         <td>
           <div class="input">
-            <%= select "search", "sort", [["Last updated", "updated_at"], ["Name", "name"], ["Recently created", "created_at"], ["Post count", "post_count"]], :selected => params[:search][:sort] %>
+            <%= select "search", "order", [["Last updated", "updated_at"], ["Name", "name"], ["Recently created", "created_at"], ["Post count", "post_count"]], :selected => params[:search][:order] %>
           </div>
         </td>
       </tr>