ENGINES: Fix getSavegameFile for almost all engines

Use kSimpleSavesNames correctly, add where needed, remove where needed.

Trac #12977

engines/tony/metaengine.cpp

@@ -72,6 +72,7 @@ bool TonyMetaEngine::hasFeature(MetaEngineFeature f) const {
 		(f == kSupportsLoadingDuringStartup) ||
 		(f == kSupportsDeleteSave) ||
 		(f == kSavesSupportMetaInfo) ||
+		(f == kSimpleSavesNames) ||
 		(f == kSavesSupportThumbnail);
 }