Updating custom fields does not trigger update to "updated_on" field in the customized object (#5354).

Patch by Yuichi HARADA.


git-svn-id: http://svn.redmine.org/redmine/trunk@19541 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/plugins/acts_as_customizable/lib/acts_as_customizable.rb

@@ -146,6 +146,7 @@ module Redmine
           end
           self.custom_values = target_custom_values
           custom_values.each(&:save)
+          touch if !saved_changes? && custom_values.any?(&:saved_changes?)
           @custom_field_values_changed = false
           true
         end