500ms is an eternity on modern machines

Change-Id: I7f16935e9b09c734d05d2430dc0efb3be44617b8
Reviewed-on: https://gerrit.libreoffice.org/16038Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>