Otherwise the cached information we store about e.g. table rows
and columns will not be updated, as QAccessible::isActive() is
false during QAbstractItemViewPrivate::rowsInserted(), and as a
result we'll be operating on stale information when the system
comes back later to query us about one of the cells.
This was observed when running a Qt Widgets table app with
the system's Keyboard Viewer open.
Pick-to: 6.6
Change-Id: I88efd46dbc3d35c8b1888d3e29ef3d001bb9eac7
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
cf13e4c84c