Bring images controller from spree_backend so we can merge it with ofn's decorator

app/controllers/spree/admin/images_controller.rb

@@ -0,0 +1,35 @@
+module Spree
+  module Admin
+    class ImagesController < ResourceController
+      before_filter :load_data
+
+      create.before :set_viewable
+      update.before :set_viewable
+      destroy.before :destroy_before
+
+      private
+
+        def location_after_save
+          admin_product_images_url(@product)
+        end
+
+        def load_data
+          @product = Product.find_by_permalink(params[:product_id])
+          @variants = @product.variants.collect do |variant|
+            [variant.options_text, variant.id]
+          end
+          @variants.insert(0, [Spree.t(:all), @product.master.id])
+        end
+
+        def set_viewable
+          @image.viewable_type = 'Spree::Variant'
+          @image.viewable_id = params[:image][:viewable_id]
+        end
+
+        def destroy_before
+          @viewable = @image.viewable
+        end
+
+    end
+  end
+end