Link to issue number:

Related to #9209
Fixes #9202

Summary of the issue:

Virtualbox 5.2 and above freeze in their mainwindow when NVDA is active. The accessibility implementation of the list of VMs is broken. When NVDA tries to get the active child in the list, child.next keeps on returning the same child over and over again, resulting into an endless loop.

Description of how this pull request fixes the issue:

1. When getting the active child, this pr will first use the firstChild.next.next approach. When this fails, it loops through the children using the children property.when the
2. This also uses the new focusRedirect system in favour of overriding event_gainFocus, see Use the new focusRedirect system rather than overriding event_gainFocus on objects #9209

Testing performed:

Tested and confirmed that Virtualbox 6.0.0 no longer freezes.

Known issues with pull request:

I'm not sure whether the first approach (i.e. firstChild.next, etc.) has been chosen on purpose in the past. In the current situation, it is ok to loop through the children, however I"m afraid that this might cause regressions in other places. Therefore, this code might be more complex than necessary.

Change log entry:

• Bug fixes
  • NVDA no longer freezes in the mainwindow of Virtualbox 5.2 and above. (virtual box v6.0.0 accessibility issues with nvda and the user interface #9202)