It would be nice
if both these approaches and possibly the combinatorial one
where included
in a menu item
"model". It will be easy for the average use and students to
use.
Each contributed function package can specify a location in the
menus where it wants to attach itself. Whether it is actually
entering the menus is a decision of the user, gretl asks about this
when the package is installed.
So AFAICS your suggestion basically applies to the built-in omit
--auto option which currently has no menu equivalent I think
(anybody correct me if I'm wrong). This would most naturally go into
the menus of the model window, not of the main window.