fdo#73159 Make border dialog work again

It seems converting to SfxSingleTabDialog makes it work.
Similar conversions were made on master branch.

Change-Id: I49985bed56f12460d289c7f0d4e1c1435aa4674e
Reviewed-on: https://gerrit.libreoffice.org/8377
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Miklos Vajna <vmiklos@collabora.co.uk>