Remove visual noise from animations

Change-Id: I45b8019bebf6530136642bf34be829d7e26e2454
Reviewed-on: https://gerrit.libreoffice.org/8228
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>