@Pavel-Levdik
personally I would post a feature request here and a more detailed description about how it actually should work.
If I had to think about the request and have already some questions in mind, like
should it preserve on npp shutdown, configurable in number, based on access time or how often
a file has been opened …, I probably would not spent time coding it if I don’t think it is useful to me too.
Can’t say for sure that this helps to get it implemented but certainly can’t hurt.
Cheers
Claudia