add FILEOPEN_READONLY_VERSION_FILTEROPTIONS Retained FILEOPEN_READONLY_VERSION just in case. Change-Id: Ie03ab09bfeea94682461ff0015432f1e1030f101 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/207509 Tested-by: Jenkins Reviewed-by: Ilmari Lauhakangas <ilmari.lauhakangas@libreoffice.org> (cherry picked from commitfb02e9d1fc) Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209134 (cherry picked from commitc2ac493692) Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209305 Reviewed-by: Jonathan Clark <jonathan@libreoffice.org> Reviewed-by: Michael Weghorn <m.weghorn@posteo.de> Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org> Tested-by: Michael Weghorn <m.weghorn@posteo.de> Reviewed-by: Dan Williams <dcbw@libreoffice.org>