rework configuration save, load configuration backups when available and config cannot be read

fix unnecessary config reload on save

MareSynchronos/MareConfiguration/XivDataStorageService.cs

@@ -8,5 +8,5 @@ public class XivDataStorageService : ConfigurationServiceBase<XivDataStorageConf
 
     public XivDataStorageService(string configDir) : base(configDir) { }
 
-    protected override string ConfigurationName => ConfigName;
+    public override string ConfigurationName => ConfigName;
 }