This is required in order to get the theme config keys of the various apps into
themes.config; this way, the routerconsole requires no knowledge of what apps
support universal theming, and can just blanket apply themes to all known keys.

FIXME: ensure that _theme is only read from the config file once per page load.

Directory column could do with a different icon.

The header icons are self-explanatory (but tooltip also has header text); the
status text is available from the tooltip.

   - Don't send a keepalive to a peer we are going to disconnect
   - Disconnect peer when idle a long time
   - PeerCheckerTask cleanup
   - Static ref cleanup
   - Don't show a downloaded torrent file as "seeding"
   - Better torrent file download icon (from Silk, same license as the others)

             TrackerClient holds on to the old one and that causes it
             to not get peers. Possibly fixes ticket #563.

   - Improve torrent shutdown handling to maximize chance of
     announces getting to tracker
   - Clean up delete-torrent messages
   - Remove redundant shutdown hook
   - Avoid NPE in PEX message handling
   - Log tweaks

   - Reduce TrackerClient threads
   - Reduce delay between peer adds for faster startup
   - Thread the announces and reduce timeout when stopping

   - Display torrent file downloads in torrent area
   - Sort magnets and downloads first
   - Fix sorting problem when torrent dir is a symlink
   - Reduce max file idle time
   - arrow_down icon copied from console css

   - Move private tracker config from create box to torrent config
   - Refactor private and open tracker configuration
   - Add private indication on details page

   - Close connection immediately if bad protocol,
     this makes blacklist work better too
   - Stop adding peers when we hit the limit
   - Lower limit for outbound connections so we give
     new peers a better chance in large swarms

   - Add per-hour conn limit
   - Blacklist peer after two bad handshakes
   - Reduce connect timeout