Ask user to save unsaved pipeline before exiting the program.

[Losses]

To prevent some disaster happens... just something happened to me...

Another thing just found is the program always asks me to choose a new path for the pipeline to be saved. Could the default behavior change to overwriting the original file to reduce the complexity of the user's operation?

[TimVanMourik]

Hi @Losses, thanks for the comment. Yes, that would be quite a reasonable UX update. However, I decided to reimplement Porcupine as a web application GiraffeTools and will only passively maintain Porcupine and review Pull Requests, but not actively add in new functionality.