FEATURE: allow users to persist customization with &sticky=true

app/controllers/application_controller.rb

@@ -171,14 +171,23 @@ class ApplicationController < ActionController::Base
 
   def inject_preview_style
     style = request['preview-style']
-    if style.blank?
+
+    if style.nil?
+      session[:preview_style] = cookies[:preview_style]
+    else
+      cookies.delete(:preview_style)
+
+      if style.blank? || style == 'default'
         session[:preview_style] = nil
-    elsif style == "default"
-      session[:preview_style] = ""
       else
         session[:preview_style] = style
+        if request['sticky']
+          cookies[:preview_style] = style
         end
       end
+    end
+
+  end
 
   def disable_customization
     session[:disable_customization] = params[:customization] == "0" if params.has_key?(:customization)