related to tdf#73691 - AltX: use alt-c for eu, gl, nl, pt-BR

Unicode Notation toggle's alt-X conflicts with the main menu for Basque,
Galician, Dutch, and Brazilian Portugese.  Replaced with Alt-C which matches
the alternate combination already assigned for German.

If MSWord uses a different combination for these languages, someone can
request a matching change.  Dutch is confirmed as using the conflicting Alt-X,
but the other languages are unknown status in MSWord.

Change-Id: Id07fc825aa7df427b4e7d1db9026dc1665a14a0d
Reviewed-on: https://gerrit.libreoffice.org/20370Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
(cherry picked from commit 2ffe2b0c)
Reviewed-on: https://gerrit.libreoffice.org/20390

officecfg/registry/data/org/openoffice/Office/Accelerators.xcu

@@ -218,12 +218,20 @@
           -->
           <value xml:lang="de"    install:module="unxwnt"></value>
           <value xml:lang="vi"    install:module="unxwnt"></value>
+          <value xml:lang="eu"    install:module="unxwnt"></value>
+          <value xml:lang="gl"    install:module="unxwnt"></value>
+          <value xml:lang="nl"    install:module="unxwnt"></value>
+          <value xml:lang="pt-BR" install:module="unxwnt"></value>
         </prop>
       </node>
       <node oor:name="C_MOD2" oor:op="replace">
         <prop oor:name="Command">
           <value xml:lang="x-no-translate">I10N SHORTCUTS - NO TRANSLATE</value>
           <value xml:lang="de"    install:module="unxwnt">.uno:UnicodeNotationToggle</value>
+          <value xml:lang="eu"    install:module="unxwnt">.uno:UnicodeNotationToggle</value>
+          <value xml:lang="gl"    install:module="unxwnt">.uno:UnicodeNotationToggle</value>
+          <value xml:lang="nl"    install:module="unxwnt">.uno:UnicodeNotationToggle</value>
+          <value xml:lang="pt-BR" install:module="unxwnt">.uno:UnicodeNotationToggle</value>
         </prop>
       </node>
       <node oor:name="X_MOD1_MOD2" oor:op="replace">