I will keep the Category column and change the values displayed, in order to reproduce the new user-friendly categorization Kovid implemented in Calibre 8.9 - for instance: Type - Edit Book tool; Category - Extend the calibre Editor. I thought I was already doing this but not really. This was meant mainly for use in the dropdown chooser. User may choose to display on the table just one of those columns and keep the sortability of the same values.
I wasn't able to reproduce the Refresh incident you mentioned with changing QV (Quick View) and doing the table refresh.
Regarding the CCR shortcut: what, is it still displaying blank for you? I have tested latest version on several calibre installs and it displays None... What happens if you uninstall CCR, then reinstall the latest version? Please confirm this before I make a temp version with default shortcut assigned for tests. BTW I can't find such 'SBD' shortcut
When I filter 'scroll' the only shortcut I see is 'Auto scroll book list'
As for the Is Disabled column: good catch, though I find this being seldom used, as Calibre allows disabling only some plugin types (e.g. metadata sources)