Datepicker: Don't set _curInst in hideDatepicker. Fixes #8174 - jQuery datepicker is stuck open if label is clicked from open state.
Datepicker: Don't set _curInst in hideDatepicker. Fixes #8174 - jQuery datepicker is stuck open if label is clicked from open state.

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