CLOUDSTACK-5480: Fix broken password confirm validation

Properly destroy add account dialog on close, to fix password confirm
validation pointing to wrong dialog's field.

ui/scripts/ui-custom/accountsWizard.js

@@ -26,6 +26,7 @@
 
                 var close = function() {
                     $wizard.dialog('destroy');
+                    $wizard.remove();
                     $('div.overlay').fadeOut(function() {
                         $('div.overlay').remove();
                     });