[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

zone/main.cpp

@@ -386,9 +386,9 @@ int main(int argc, char** argv) {
 		LogInfo("Initialized dynamic dictionary entries");
 	}
 
-	content_service.SetExpansionContext();
-
-	ZoneStore::LoadContentFlags();
+	content_service.SetDatabase(&database)
+		->SetExpansionContext()
+		->ReloadContentFlags();
 
 	event_scheduler.SetDatabase(&database)->LoadScheduledEvents();