Event System: support changing NDOF button shortcuts

source/blender/editors/interface/interface_context_menu.c

@@ -1036,7 +1036,7 @@ bool ui_popup_context_menu_for_button(bContext *C, uiBut *but, const wmEvent *ev
 
     /* We do have a shortcut, but only keyboard ones are editable that way... */
     if (kmi) {
-      if (ISKEYBOARD(kmi->type)) {
+      if (ISKEYBOARD(kmi->type) || ISNDOF_BUTTON(kmi->type)) {
 #if 0 /* would rather use a block but, but gets weirdly positioned... */
         uiDefBlockBut(block,
                       menu_change_shortcut,