Accessibility. Inaccessible shut down virtual machine screen with screen readers enabeled

[Vsevolod Popov]

When navigating in the virtual machine shut down screen, none of the elements can be announced by screen reader. All of the elements are announced as "Unknown". Steps to reproduce:

1. Launch NVDA. You can get it from:

​https://nvaccess.org/

2. Launch virtual box and launch virtual machine in it.
3. When the virtual machine is launched, press right CTRL+q key combination.

You will here: close virtual machine.

4. Tab between elements.

You will here "Unknown". Expected result: Screen reader should announce the element's name, role and value. For example: Save button Shut down button. Actual result: Screen reader doesn't announce any elements, it keeps saying "Unknown" while tabbing, so it is impossible to shut down the virtual machine using the screen reader. See standards and guides: ​https://www.w3.org/WAI/WCAG21/Understanding/name-role-value.html

[Vsevolod Popov]

This is the screenshot of the screen when the issue appears.

[Vsevolod Popov]

The host type is windows, the guest type is other.

[Vsevolod Popov]

This bug can be deleted. More detailed bug report about this issue was created here. https://www.virtualbox.org/ticket/20581/