allow login required screen to be customized

app/controllers/static_controller.rb

@@ -27,6 +27,10 @@ class StaticController < ApplicationController
       file = "static/#{page}.en"
     end
 
+    if not lookup_context.find_all("#{file}.html").any?
+      file = "static/#{page}"
+    end
+
     if lookup_context.find_all("#{file}.html").any?
       render file, layout: !request.xhr?, formats: [:html]
       return

app/models/site_content.rb

@@ -20,6 +20,7 @@ class SiteContent < ActiveRecord::Base
   add_content_type :login_required_welcome_message, default_18n_key: 'login_required.welcome_message'
   add_content_type :privacy_policy, allow_blank: true
   add_content_type :faq, allow_blank: true
+  add_content_type :login_required, default_18n_key: 'login_required.welcome_message'
 
   def site_content_type
     @site_content_type ||= SiteContent.content_types.find {|t| t.content_type == content_type.to_sym}

app/views/static/login.en.html.erb

@@ -1 +0,0 @@
-<%= markdown_content(:login_required_welcome_message) %>

app/views/static/login.html.erb

@@ -0,0 +1 @@
+<%= PrettyText.cook(SiteContent.content_for(:login_required)).html_safe %>