Not sure what this is tweaking (I'll check) but this does not seem to affect the described behaviour.. PgUp/Down does nothing - with and without shift - and mou

Not sure what this is tweaking (I'll check) but this does not seem to affect the described behaviour.. PgUp/Down does nothing - with and without shift - and mousewheel still just scrolls thru shell comand history and I need to use Ctrl-B ] to get into session output history..