With several legacy pre-ODF1.2 and ODF1.2-only consumers out there,
folks wanted a more backward-compatible ODF1.2 extended mode, that
uses stuff deprecated in 1.2, and/or is 'bug-compatible' to older
OOo-versions.

Therefore, adding ODFVER_012_EXT_COMPAT, and sticking it to several
attributes that were ODFVER_LATEST before.