Unexpected empty accesskey attribute set to MultiSelect by default

[veselints]

Bug report

MultiSelect renders an empty accesskey attribute on its input, when no access key is passed to its <select> element.

Reproduction of the problem

Run the MultiSelect demo and review the markup of the widget. You will notice its <input> has an accesskey attribute.

Expected/desired behavior

accesskey attribute should not be present

Environment

• Kendo UI version: 2021.1.119
• Browser: [all]