Datepicker: Modified _updateDatepicker to not update display if updated instance is not current instance. Fixed #6814 - datepicker('setDate') incorrectly overwrites current display with two datepickers.
Datepicker: Modified _updateDatepicker to not update display if updated instance is not current instance. Fixed #6814 - datepicker('setDate') incorrectly overwrites current display with two datepickers.

GrayYoung/jQuery.UI.Extension,GrayYoung/jQuery.UI.Extension