actually fix image table import and export

Author: LeftofZen

Definitions/ObjectModels/IImageTableNameProvider.cs

@@ -45,5 +45,5 @@ public bool TryGetImageName<T>(T model, int id, [MaybeNullWhen(false)] out strin
 	}
 
 	public static string GetImageName(int id)
-		=> $"{id}-unnamed";
+		=> $"unnamed_{id}";
 }