I suggest to be able to put the litematic files into folders (inside the schematics folder), and it whould be a visible in a dropdown of that folder in the litematic selection menu

For example:

🤔

You have always been able to use directories for organization. There are even three buttons on the top for jumping to the "root" directory, going to the parent directory and creating new directories. Also backspace works as a hotkey to go to the parent directory.

Never mind than 🙃