and don't invalidate on first view

Change-Id: I1156c83c0365ef27946cc414cad8dfa07206e5af
Reviewed-on: https://gerrit.libreoffice.org/43498Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>