Quickstarter removal code in MSI Installer compiled as UNICODE

Functions suffixed with A/W (ANSI/Wide) as needed for clarity

Change-Id: I50aa27a753542fc0ddf002f385de78ba106b17ab
Reviewed-on: https://gerrit.libreoffice.org/25153Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>