RefreshPolicy/RefreshPolicyEx send WM_SETTINGCHANGE even on Home editions

RefreshPolicy (or RefreshPolicyEx) causes Windows to examine the Group Policy POL files and apply changes to the Registry. System applications like Explorer are notified of the update. On Home editions, the system does not have the Group Policy infrastructure to apply POLs, but once the Registry is updated, the refresh-policy functions can trigger some applications to see the changes. The functions seem to broadcast WM_SETTINGCHANGE, even on Home editions.