[SearchBar] Multi-term queries on analysed fields no longer specify and/or operators.

[tobio]

Prior to #6217, querying for name:ndap-home would by default generate something like:

{
  "match": {
    "name": {
      "query": "ndap-home",
      "operator": "and"
    }
  }
}

Matching only fields with both ndap and home after the query is analysed.

With #6217 the operator: and option is no longer specifying, and so fields with either ndap or home are now matched.