Remove news and fix default_url in ImageUploader

app/uploaders/image_uploader.rb

@@ -32,7 +32,7 @@ class ImageUploader < CarrierWave::Uploader::Base
   #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
   # end
   def default_url
-    Site.first.default_image.url rescue "-sign-in-logo.png"
+    [version_name, (Site.first.default_image.file.url rescue "sign-in-logo.png")].compact.join('_')
   end
   
   # Process files as they are uploaded: