[Expansion] Content Filtering Adjustments (#1910)

* Change default expansion values for ALL to -1 from 0

* Adjust content_filter_criteria

* Refactor content filtering logic

* Allow flag strings to also just be empty instead of null

* Formatting

* Editor oops

world/main.cpp

@@ -503,6 +503,11 @@ int main(int argc, char **argv)
 	LogInfo("Initializing [EventScheduler]");
 	event_scheduler.SetDatabase(&database)->LoadScheduledEvents();
 
+	LogInfo("Initializing [WorldContentService]");
+	content_service.SetDatabase(&database)
+		->SetExpansionContext()
+		->ReloadContentFlags();
+
 	LogInfo("Initializing [SharedTaskManager]");
 	shared_task_manager.SetDatabase(&database)
 		->SetContentDatabase(&content_db)