Get rank of searched delegates about lisk-ui

[slaweet]

It would be really easy to add if it were in the backend search API, but it's currently no there:
https://login.lisk.io/api/delegates/search?q=thepool

{
  "success": true,
  "delegates": [
    {
      "username": "thepool",
      "address": "10839494368003872009L",
      "publicKey": "b002f58531c074c7190714523eec08c48db8c7cfc0c943097db1a2e82ed87f84",
      "vote": "2055494273922278",
      "producedblocks": 6859,
      "missedblocks": 345
    }
  ]
}