Add fix for special characters in filenames and urls.

Author: lkacenja

app/helpers/url_decoded_attribute_helper.rb

@@ -0,0 +1,8 @@
+module UrlDecodedAttributeHelper
+  def url_decoded_attribute(attribute)
+    define_method(attribute) do
+      return nil if self[attribute].nil?
+      CGI.unescape(self[attribute])
+    end
+  end
+end

app/models/document.rb

@@ -1,9 +1,14 @@
 class Document < ApplicationRecord
+  extend UrlDecodedAttributeHelper
+
   belongs_to :site
   has_many :workflow_histories, class_name: "DocumentWorkflowHistory"
 
   has_paper_trail versions: {scope: -> { order(created_at: :desc) }}
 
+  url_decoded_attribute :file_name
+  url_decoded_attribute :url
+
   scope :by_status, ->(status) {
     case status
     when "in_review"