Allow pagination of product search results.

[Fixes #1539]

core/app/views/spree/shared/_products.html.erb

@@ -26,6 +26,5 @@
 <% end %>
 
 <% if paginated_products.respond_to?(:num_pages)
-      params.delete(:search)
       params.delete(:taxon)
 %><%= paginate paginated_products %><% end %>

core/spec/requests/products_spec.rb

@@ -106,6 +106,22 @@
     tmp.sort!.should == ["Ruby on Rails Ringer T-Shirt", "Ruby on Rails Stein", "Ruby on Rails Tote"]
   end
 
+  it "should be able to display products priced between 15 and 18 dollars across multiple pages" do
+    Spree::Config.products_per_page = 2
+    within(:css, '#taxonomies') { click_link "Ruby on Rails" }
+    check "Price_Range_$15.00_-_$18.00"
+    within(:css, '#sidebar_products_search') { click_button "Search" }
+
+    page.all('ul.product-listing li').size.should == 2
+    tmp = page.all('ul.product-listing li a').map(&:text).flatten.compact
+    tmp.delete("")
+    tmp.sort!.should == ["Ruby on Rails Ringer T-Shirt", "Ruby on Rails Tote"]
+    find('nav.pagination .next a').click
+    tmp = page.all('ul.product-listing li a').map(&:text).flatten.compact
+    tmp.delete("")
+    tmp.sort!.should == ["Ruby on Rails Stein"]
+  end
+
   it "should be able to display products priced 18 dollars and above" do
     within(:css, '#taxonomies') { click_link "Ruby on Rails" }
     check "Price_Range_$18.00_-_$20.00"