This removes the dialog used to show version information and
command line help on Windows. Now, selecting and scrolling becomes
possible, code is simplified and unified under all platforms.

Change-Id: Ia749bbb62d697eff655b3a646859c1986a023ec0
Reviewed-on: https://gerrit.libreoffice.org/31059Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>