Use config system for facet and filter params
Use config system for facet and filter params

stephenmcm/silverstripe-solr,nyeholt/silverstripe-solr,stephenmcm/silverstripe-solr,stephenmcm/silverstripe-solr,nyeholt/silverstripe-solr,nyeholt/silverstripe-solr,stephenmcm/silverstripe-solr,nyeholt/silverstripe-solr