Per @Greengroove's feedback, changing syntax to:
[Show|Hide] # grp1 - grp2 - grp3 | mode
mode can be any of these for the new Disable behavior:
"Disable"
"Comment"
"Remove" (slightly different from FilterBlast impl)
Any other mode is treated as the default behavior.
Filtration always writes out as "Disable" or default (none)
Also removed vestigal logging and comments.
07fc5588a7