Red request: more topic-based commands

[John Griffith <griffith@sfs.nphil.uni-tuebingen.de>]

I learned the other day from this list that `M-g' on a topic just
updates groups in that topic.  Nice.

How about something similar for other commands like `l' and `L'?  This
would allow you to show, say, level 3 groups under one topic, but
level 2 groups under other ones.

I don't know what the best key maps would be `(prefix) T l'?
`(perfix) M-l'?  `M-l' and `M-L' are just bound to
downcase-region-or-word which don't make any sense in the group buffer
anyway.  But perhaps `T' commands would fit better with the current
keymap setup.