Published packs no longer show deleted shader objects

• Fixed: after you synced a pack, removed a shader object and published, players joining were still sent the removed object (drawn as a missing-character box). A published pack is now always drawn from what you published. Whoever is holding a Sync still sees what they synced.
• New: overlays.trigger-ticks in config.yml sets how often HUD triggers such as sneaking or holding an item are checked, from every tick (1) to once a second (20). The default is still 2. See Configuration.