We need to adapt the accessibility code to handle VCLEVENT_TOOLBOX_ITEMUPDATED,
since it is now sent from vcl/source/window/toolbox2.cxx.
I have tested the patch successfully on Windows and Fedora.

Change-Id: Ia4328d3c34547cc28ce9a3946f90223442ee84e3
Reviewed-on: https://gerrit.libreoffice.org/14190Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>