Revert "tdf#125268: Export LO character background as MSO shading by default."

This reverts commit 701238ea7d8a06fe7a90de15b7660b7c6d854f09.

Reason for revert: <INSERT REASONING HERE>

Change-Id: I56facce4191644a4aaf565e572abab400e2b61a0
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91388
Tested-by: Jenkins
Reviewed-by: Tamás Zolnai <tamas.zolnai@collabora.com>
diff --git a/officecfg/registry/schema/org/openoffice/Office/Common.xcs b/officecfg/registry/schema/org/openoffice/Office/Common.xcs
index 1307269..f52ac45 100644
--- a/officecfg/registry/schema/org/openoffice/Office/Common.xcs
+++ b/officecfg/registry/schema/org/openoffice/Office/Common.xcs
@@ -3973,7 +3973,7 @@
              <desc>Specifies if character background is exported as highlighting
              (and not as shading) when saving to Word document</desc>
            </info>
            <value>false</value>
            <value>true</value>
          </prop>
        </group>
      </group>