[PATCH bash ordered autocomplete] Order the autocompletion in bash

[Pat Burroughs (Celti)]

Excerpts from J Rt's message of March 30, 2020 1:32 am:
> I implemented the changes you recommended and checked that things work
> fine in bash, things look good on my machine (bash 4.4.20).

Has anyone checked to see what this patch does on bash versions that 
don't support `-o nosort` — e.g., the bash 3.x that is still the default 
on MacOS?