Follow-up liveLinkStore first fetch with regular fetch immediately

[LeosPrograms]

I don't have permissions to make a pull request, but I would suggest something like this on main-0.5 in packages/stores/src/holochain.ts:485

    const fetch = async () => {
      if (!active) return;
      if (isFirstFetch) {
        isFirstFetch = false
        const firstLinks = await firstFetchLinks();
        maybeSet(firstLinks);
      }
      const nlinks = await fetchLinks().finally(() => {
        if (active) {
          setTimeout(() => fetch(), pollIntervalMs);
        }
      });
      maybeSet(nlinks);
    };

This would allow an immediate network call followup after a local fetch, to remove unnecessary waiting time for network data.