Don't show None in the maxPrice field when price is not set
Don't show None in the maxPrice field when price is not set

Would replace 0 with the empty string, but the maxPrice can't be 0

alphagov/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend,mtekel/digitalmarketplace-admin-frontend