Changed comparison to highlight selected date, fixes #5676 (DatePicker Dialog defaultDate incorrect behaviour)

Author: afcapel

ui/jquery.ui.datepicker.js

@@ -1491,7 +1491,7 @@ $.extend(Datepicker.prototype, {
 							(otherMonth && !showOtherMonths ? ' ' : // display for other months
 							(unselectable ? '<span class="ui-state-default">' + printDate.getDate() + '</span>' : '<a class="ui-state-default' +
 							(printDate.getTime() == today.getTime() ? ' ui-state-highlight' : '') +
-							(printDate.getTime() == currentDate.getTime() ? ' ui-state-active' : '') + // highlight selected day
+							(printDate.getTime() == selectedDate.getTime() ? ' ui-state-active' : '') + // highlight selected day
 							(otherMonth ? ' ui-priority-secondary' : '') + // distinguish dates from other months
 							'" href="#">' + printDate.getDate() + '</a>')) + '</td>'; // display selectable date
 						printDate.setDate(printDate.getDate() + 1);