Revert most of the stuff done in the last few weeks. Per conversation with markey, taking a new tack with devices because of my limited time: use the working, featureful code we already have but simply port. First, get everything ported to Solid. Second, port to use Meta instead of MetaBundles (help much appreciated). Third, if time and everything else permits, try to show at least read-only collections of device tracks in the collection browser.