Let's say we have "Auto" category and we use cars attr. plugin.When someone search inside this category some extrafields will be added like :"Make,Model etc".
He select Make Audi,Model A4 and perform search.
After that,he change only the category (from "auto" to "real estates")and perform a new search.Parametters like make=audi&mode=a4 will be kept in the url and will found no result.How to keep that parameters in url only if a certain category will be selected?
