Pagination links lose filter parameters

[tpoliaw]

When calling /search (and /distinct?) with a series of filters, these are not reflected in the pagination links in the response, eg

# Ignoring urlencoding for readability
$ curl http://localhost:8000/api/v1/search/?filter[eq][condition][key]=start.instrument&filter[eq][condition][value]="ixx" | jq '.links.self'
http://localhost:8000/api/v1/search/?page[offset]=0&page[limit]=100

where the filters are lost. The same applies to the first/last/next/prev links.