Dataset field tooltips

[jurgenbelien]

Adds tooltips for the select fields in the active dataset panel.
Test it by overriding a coclicodata collection, like slp:

  "summaries": {
    "scenarios": [
      "high_end",
      "ssp126",
      "ssp245",
      "ssp585"
    ],
    "ensemble": [
      "msl_h",
      "msl_m",
      "msl_l"
    ],
    "time": [
      "2031",
      "2041",
      "2051",
      "2061",
      "2071",
      "2081",
      "2091",
      "2101",
      "2111",
      "2121",
      "2131",
      "2141",
      "2151"
    ]
  },
  "summary_descriptions": {
    "scenarios": "lorem ipsum",
    "ensemble": "lorem ipsum",
    "time": "lorem ipsum"
  },

[netlify]

✅ Deploy Preview for coclico ready!

Name	Link
🔨 Latest commit	0a9b484
🔍 Latest deploy log	https://app.netlify.com/sites/coclico/deploys/6772a78bd6d4bc000878451b
😎 Deploy Preview	https://deploy-preview-33--coclico.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.