SingleUseDialog: destroy existing widget with same id on create

js/SingleUseDialog.js

@@ -1,6 +1,17 @@
+/* eslint-disable prefer-rest-params */
 /* global dijit, define */
 define(["dojo/_base/declare", "dijit/Dialog"], function (declare) {
 	return declare("fox.SingleUseDialog", dijit.Dialog, {
+      create: function(params) {
+            const extant = dijit.byId(params.id);
+
+            if (extant) {
+                  console.warn('SingleUseDialog: destroying existing widget:', params.id, '=', extant)
+                  extant.destroyRecursive();
+            }
+
+            return this.inherited(arguments);
+      },
       onHide: function() {
          this.destroyRecursive();
       }