Work around workaround for old MSVC 2012

...not allowing certain o3tl::is_typed_flags::Wrap conversion operators to be
explicit, thus causing ambiguities here.

Change-Id: I5108885229eb185ceac57042e67405b393cdcf3b
fdo#78826 HIG: missing colons and capitalization in sc

Also:
* Something I missed from the HIG: standardize Help button position

Change-Id: Iaac65bd277d87ff58883f287808a5c5b804cc04e
Reviewed-on: https://gerrit.libreoffice.org/12015
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>