[FIX] Admin not working on IE11 (#19348)

Co-authored-by: Douglas Fabris <deefabris@gmail.com>

client/polyfills/index.js

@@ -6,3 +6,18 @@ import './cssVars';
 Object.fromEntries = Object.fromEntries || function fromEntries(iterable) {
 	return [...iterable].reduce((obj, { 0: key, 1: val }) => Object.assign(obj, { [key]: val }), {});
 };
+(function(arr) {
+	arr.forEach(function(item) {
+		if (item.hasOwnProperty('remove')) {
+			return;
+		}
+		Object.defineProperty(item, 'remove', {
+			configurable: true,
+			enumerable: true,
+			writable: true,
+			value: function remove() {
+				this.parentNode.removeChild(this);
+			},
+		});
+	});
+}([Element.prototype, CharacterData.prototype, DocumentType.prototype]));