resolved fdo#61946 use correct TabDelta for UpdateReference

The sheet delta was reverted resulting in the references not being
updated when conditional formats were copy-pasted between sheets. Saved
to .ods then was an identical calcext:target-range-address as for the
copied source range.

(cherry picked from commit ef8e0beba442f58abe3bc77f6f55fc6109025dd4)

Backported.

Change-Id: I038b58f20f71ff1393dccafa3021dac02cd69e4b
Reviewed-on: https://gerrit.libreoffice.org/6768
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>