NB Implementation: show menubar in NBShortcuts

Change-Id: I44acbdd96a7ede1fc89bbafbd1eb7c5bf25fc193
Reviewed-on: https://gerrit.libreoffice.org/52936Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: andreas_kainz <kainz.a@gmail.com>

sc/uiconfig/scalc/toolbar/notebookbarshortcuts.xml

@@ -12,4 +12,5 @@
   <toolbar:toolbaritem xlink:href=".uno:Save"/>
   <toolbar:toolbaritem xlink:href=".uno:Undo"/>
   <toolbar:toolbaritem xlink:href=".uno:Redo"/>
+  <toolbar:toolbaritem xlink:href=".uno:Menubar"/>
 </toolbar:toolbar>