duplicate content

As already stated here #1583 (updated with new comments), this is not a fix (by no means), just a fix for the still erroneous lines IMHO. Ideally, we should have this:

if multiple categories are selected on search:
meta description = search pattern - website title

or if single category is being searched or on a category or subcategory root:
meta description = search pattern - search (sub)category - website title