Changelog
- Add migration 055 content_revisions; the editor bumps a row in the same transaction as each save
- Add ContentReload: WorldTask polls the revisions every 5 s and reloads client catalogs, quests and dialogue, or one map's NPCs, for each changed row
- ReloadQuests reloads QuestCatalog and DialogueCatalog and resends every online quest log with the definitions-changed flag
- Add /reload quests as the manual path to the same reload