ui-date should monitor $destroy

[rwlogel]

Within the ui-date directive it should have the following:

scope.$on('$destroy', function() {
    element.datepicker('destroy');
});

An easy way to detect if this is working is to put a ui-date into a ng-repeat. Unfortunately this fix also requires a fix in the angular.js code base issue 2658 (angular/angular.js#2658).

[petebacondarwin]

Actually we should be watching the jQuery $destroy event instead. See http://plnkr.co/edit/KPYlpehlezXzgfQo4ZKy?p=preview.

element.bind('$destroy', function() {
  element.datepicker('destroy');
})