My previous post still needs an answer but I've discovered another problem with the edited menu.php where I added the extra filter for the category and subcategory live columns.
Everything worked great until I made a subsequent change to the menu which caused the menu.php to be updated.
The new menu.php loses the previous manual edit for the live columns and I have to re-enter the original 8 extra filter statements.
Is there a way to keep these statements for all subsequent menu.php updates?