Merged r11686 from trunk to 2.3-stable (#13584)
add missing Portuguese jQuery UI date picker.
jquery.ui.datepicker-pt.js is from https://raw.github.com/jquery/jquery-ui/49f9b849b9c5023f13/ui/i18n/jquery.ui.datepicker-pt.js
Authored by: tmaruyama 2013-03-25
Parent: [r11689]
Child: [r11691]