Emoji picker and tests for the tops

IconSelect is now an emoji picker with search, categories and a virtual grid. The virtual grid is not optional, rendering every emoji at once makes the whole page crawl.

The important part of the day is less fun: integration tests for the tops materialized views, all of them - type, user, geo, device, referrer and sessions. These are the queries the dashboard lives on and I had been changing them without any safety net.

Events also carry app and device fields now, plus a free Data map[string]any, and the client can override geo and device if it knows better than the server.