Update region_ops.txt to better describe the current behaviour of
Editor::get_regions_from_selection_and_edit_point(), and fix a couple of
comments that still referred to the no-longer-existing 'edit' property of
route groups.
operated on in different circumstances. Make the main menubar Region menu
the same as the context one, and use the same logic to sensitize/desensitize
actions for them.
git-svn-id: svn://localhost/ardour2/branches/3.0@7954 d708f5d6-7413-0410-9779-e7cbd77b26cf
