Widgets in readonly state are incorrectly read as "editable" by NVDA

[IvanDanchev]

Bug report

The aria-readonly attribute was removed from input elements with role "listbox" or "combobox": #1740
Currently, the WAI-ARIA specification lists these roles as compatible with the aria-readonly attribute: https://www.w3.org/TR/wai-aria-1.1/#aria-readonly
As a result of the attribute removal, the DateTimePicker and the ComboBox (and potentially other widgets that render an input element with one of these two roles) in readonly state are read as "editable" by NVDA.

Reproduction of the problem

Dojo example.

1. Run NVDA and focus the DateTimePickers and the ComboBox.

Current behavior

NVDA reads them as "editable", which is incorrect.

Expected/desired behavior

The inputs should not be read as "editable"

Environment

• Kendo UI version: 2019.3.1023
• jQuery version: x.y
• Browser: [all ]

[mparvanov]

http://kendobuild.telerik.com/dojo-staging/adiFAVIq
Dropdownree is missing aria-readonly="true"