Use QMultiHash explicitly, and build list of values in a QSet via the
range constructor.
Task-number: QTBUG-131842
Change-Id: I9cbcddeada0bfd88b11515262f5476e5d59e0fad
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
(cherry picked from commit e1217cc52bd367b7e040edeb86700dc923df39a8)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>