Add DSi style main menu

applications/main/xtreme_app/scenes/xtreme_app_scene_interface_mainmenu.c

@@ -17,6 +17,7 @@ void xtreme_app_scene_interface_mainmenu_var_item_list_callback(void* context, u
 const char* const menu_style_names[MenuStyleCount] = {
     "List",
     "Wii",
+    "DSi",
 };
 static void xtreme_app_scene_interface_mainmenu_menu_style_changed(VariableItem* item) {
     XtremeApp* app = variable_item_get_context(item);