Description of the new feature/enhancement

When one of the default profiles (PowerShell, Command Prompt, Azure Cloud Shell) is deleted from the configuration file, it still appears in the Terminal. As it is not in the configuration file, it can no longer be edited.

It would be more intuitive if the profiles are either re-created in the config file, or they disappear from the new session dropdown in the terminal.
If they were to be removed from the terminal, it would make sense if a dynamic profile was added to the configuration file when a new shell is installed, so that the user would be able to configure or delete it.