This follows up on commit d59e539b3a,
doing the same for one of its callers. The mapping from windows IDs to
IANA ones is hard-coded (using CLDR-generated data), so the
(now unchanging) availableWindowsIds() list shall always map to the
same list of IANA IDs.
Pick-to: 6.7 6.6 6.5
Task-number: QTBUG-120682
Change-Id: I4d610c24110064236b375cab04cde90bbe07735f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
8387141363