clear cache before firing the settings callback

Otherwise, callback listeners working on the change can not get the current value

app/models/setting.rb

@@ -157,12 +157,12 @@ class Setting < ActiveRecord::Base
     if new_setting.save
       new_value = new_setting.value
 
-      # fire callbacks for name and pass as much information as possible
-      fire_callbacks(name, new_value, old_setting)
-
       # Delete the cache
       clear_cache(old_cache_key)
 
+      # fire callbacks for name and pass as much information as possible
+      fire_callbacks(name, new_value, old_setting)
+
       new_value
     else
       old_setting