fixed remove filter issue and the available_at count in the side facets
added avail filter to centre header. The css over there needs tidied up
fixed issue when removing filter when two locations selected. Also fixed styling again on limit avail checkbox
Fixing facet counts. Check for limit_avail flag a replace location list with avaialable at list
fixed filter bugs
fixed retain filter for limit to avail
retain filters availfilters
retain limit avail filters