QWinRegistryKey::value<T> returns an optional<T> which can make code a
bit more readable than the std::pair<DWORD, bool> return value from
QWinRegistryKey::dwordValue.
This implements part of the "TODO: Remove once all usages are migrated
to new interface." comment in QWinRegistry class because it allows us to
remove the QWinRegistryKey::dwordValue function.
Change-Id: If568de4e31778e91ce7aadadb4aac90e41222826
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 7a63a25ef71fbbe7b3eaa6ecb9a26c3e497e582a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
8a23001ca6