Search results for `Tools > Search` or `Tools > Query` don't include urls

Tab urls (collected through aw-watcher-web) do not show up in search results for `Tools > Search` or `Tools > Query` (only the app name and app title show up).
Possible cause:
1. The bucket for aw-watcher-web is not included in the search
2. Somewhere in aw-core the url is filtered out
3. Somewhere in aw-server the url is filtered out

I've tried this query with raw json output but the urls are missing. I thought if I include browser_events, the urls would show up.

```
afk_events = query_bucket(find_bucket("aw-watcher-afk_"));
window_events = query_bucket(find_bucket("aw-watcher-window_"));
browser_events = query_bucket(find_bucket("aw-watcher-web-firefox"));
window_events = filter_period_intersect(window_events, afk_events);
window_events = filter_period_intersect(window_events, browser_events);
merged_events = merge_events_by_keys(window_events, ["app", "title"]);
RETURN = sort_by_duration(merged_events);
```

Workaround: I can do the queries I need directly on `peewee-sqlite.v2.db` in the terminal but I thought if the search/query functionality is already present in the UI then I could use it:
```
awuser@box:/aw/data/activitywatch/aw-server$ sqlite3 peewee-sqlite.v2.db 'select timestamp, datastr from eventmodel;' | sed -e 's/|{/",/ ; s/^/{"time": "/' | grep -i "github" | tail -3
{"time": "2021-10-21 03:16:11.200000+00:00","url": "https://github.com/ActivityWatch/aw-server/issues/85", "title": "Search results for `Tools > Search` or `Tools > Query` don't include urls \u00b7 Issue #85 \u00b7 ActivityWatch/aw-server", "audible": false, "incognito": false, "tabCount": 16}
{"time": "2021-10-21 03:16:12.827000+00:00","url": "https://github.com/ActivityWatch/aw-core/", "title": "ActivityWatch/aw-core: Core library for ActivityWatch", "audible": false, "incognito": false, "tabCount": 16}
{"time": "2021-10-21 03:16:15.641000+00:00","url": "https://github.com/ActivityWatch/aw-server/issues/85", "title": "Search results for `Tools > Search` or `Tools > Query` don't include urls \u00b7 Issue #85 \u00b7 ActivityWatch/aw-server", "audible": false, "incognito": false, "tabCount": 15}
```