* Added: Setting to hide the "Discover Luna" link in the top navigation.
* Changed: Hide blocked categories from the directory's category list.
* Fixed: Stream up-times not appearing in the directory.
* Fixed: Error in error handler for PubSub.
* API Added: `Dialog` now supports prepending its element to its container, rather than appending.
* API Added: `tip.add_class` for adding additional classes to rich tooltips that may now have had their element created yet.
