Remove visual noise from reportdesign

Change-Id: I2fea3ecefa24cfc0f3cc2a2f4de7c934eba5d6f7
Reviewed-on: https://gerrit.libreoffice.org/8295
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>