Add js code needed in the product images page

app/assets/javascripts/admin/spree/images/index.js.coffee

@@ -0,0 +1,15 @@
+$ ->
+  ($ '#new_image_link').click (event) ->
+    event.preventDefault()
+
+    ($ '.no-objects-found').hide()
+
+    ($ this).hide()
+    $.ajax
+      type: 'GET'
+      url: @href
+      data: (
+        authenticity_token: AUTH_TOKEN
+      )
+      success: (r) ->
+        ($ '#images').html r

app/assets/javascripts/admin/spree/images/new.js.coffee

@@ -0,0 +1,7 @@
+($ '#cancel_link').click (event) ->
+  event.preventDefault()
+
+  ($ '.no-objects-found').show()
+
+  ($ '#new_image_link').show()
+  ($ '#images').html('')