tdf#148138 change Text Boundaries color to Gray for Dark mode

Change-Id: I276896d0ea94e741be8c0ae49f79f95769e0c2a7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136234
Tested-by: Jenkins
Reviewed-by: Heiko Tietze <heiko.tietze@documentfoundation.org>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
(cherry picked from commit 4412044340ea8447058bb99f529310c2be56a5a9)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136415
diff --git a/officecfg/registry/data/org/openoffice/Office/UI.xcu b/officecfg/registry/data/org/openoffice/Office/UI.xcu
index 4e0e4c0..ab3090b 100644
--- a/officecfg/registry/data/org/openoffice/Office/UI.xcu
+++ b/officecfg/registry/data/org/openoffice/Office/UI.xcu
@@ -433,7 +433,7 @@
            <value>true</value>
          </prop>
          <prop oor:name="Color">
            <value>1842204</value>
            <value>8421504</value>
          </prop>
        </node>
        <node oor:name="AppBackground">