fdo#74477: Restore the title of the Outline Numbering window

Change-Id: I095e2c9f2a74c1052e93f222c67f9e946edfc3fc
Reviewed-on: https://gerrit.libreoffice.org/7833
Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>