The option to ignore protection breaks expected functionality
(protection, including sections protected with password), and may
cause problems mentioned in original bug. This only should be used
in specific recovery situations.

Moving it from user-visible page to Expert Configuration.
(Previously, changing it in Expert Configuration hadn't effect.)

Change-Id: Ice2f20200584acd6b476e002eb783820fa823611
Reviewed-on: https://gerrit.libreoffice.org/30968Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>