FEATURE: refresh session cookie at most once an hour

This feature ensures session cookie lifespan is extended
when user is online.

Also decreases session timeout from 90 to 60 days.
Ensures all users (including logged on ones) get expiring sessions.

lib/current_user.rb

@@ -30,6 +30,10 @@ module CurrentUser
     current_user_provider.current_user
   end
 
+  def refresh_session(user)
+    current_user_provider.refresh_session(user,session,cookies)
+  end
+
   private
 
   def current_user_provider